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Dr. Gaster Ukagaka/Ghost by zarla Dr. Gaster Ukagaka/Ghost by zarla
Alright, here goes nothing. I mentioned at the end of the desc for Hunter and Smoker that I was working on him, and now he's done! Read the following carefully! I don't want to have to answer questions I answered here already, haha.

Last updated - 7.9.18 - details
!!-Chinese translation-!!
!!!-Spanish translation-!!!

Edit - If SSP keeps closing itself, try checking this thread!
If you're having trouble petting him, look for the hotspot on top of his head where your cursor changes to a hand. Without clicking, move your mouse in that area! If you go outside the area it'll reset the stroke count. Little circles work well.
If he's locking up when updating, try restarting, or applying any Windows updates you might have waiting.

What is an Ukagaka/Ghost, you may be wondering? An Ukagaka (伺か)/Nanika (何か)/Ghost is basically a little program that adds some characters to your desktop. These characters are highly customizable and can be very complicated, depending on the Ghost. Each Ghost is different (they are not the same as Shimejis, if you're wondering). A FLELE (Shell-Collectors) is a type of Ghost, if you've messed with those. This Gaster is specifically from Handplates, so some of the stuff he says might not make much sense if you haven't read the comic. Some of it may also have spoilers for Undertale, so you should probably have played the game first as well.

I made a page for him with info and directions for how to install him, but I'll replicate most of it here for convenience's sake (and in case it goes down, which hopefully won't happen...)

Anyway, here are his features!
  • Gaster will say random things as he idles on your desktop, and his dialogue will change in a whole lot of ways as you continue to interact with him. If you ask him about Alphys, he will start to say random things about Alphys, for example. You can also make him be silent if you don't want him bothering you.
  • You can pet Gaster by stroking his head with your mouse (don't click, just move your mouse in the right area), or punch him by double-clicking his face. The more you do each action, the more his reactions to each will change.
  • Gaster can also do standard Ghost functions, such as...
    • Set a picture as your wallpaper
    • Empty your recycle bin
    • Tell you your computer's stats
    • Check if you have new email (if you set your POP settings in SSP correctly)
    • Update himself remotely when he has new material
    • If you drag and drop a compatible site on him, he'll add it to Headlines or RSS feeds, and you can see if there are new posts
  • Gaster has a pretty complex relationship system, wherein he'll track how you treat him and change his reactions and dialogue accordingly. Even small actions may change some things without you knowing.
  • You can keep track of your interactions with him through a stat menu. You can also reset Gaster back to his default state if you want to start your relationship over with him. Certain things, however, he may not forget...
  • While Gaster may not say a lot randomly while he's idling, he has an enormous amount of text in his menus. Specifically in three places:
    • You can ask him questions about many things. He has multiple responses to each, and what he says will also change depending on what you do. You may be surprised by him saying something new even if you think you've heard it all before. Asking him questions can sometimes also lead to unique interactions.
    • You can interact with him, in true Undertale fashion. The ACT menu is dynamic, and will change depending on your actions. You may notice options appearing as a result of something you did, or disappearing as his feelings towards you change. He may not always be receptive towards something you do.
    • You can give him ITEMs... or try to, anyway. Whether or not he'll accept one depends on the relationship you have with him. Certain items are permanent, and once given, can be checked on via the Item menu, or may appear randomly in general dialogue or when he boots. Other items are only accepted under certain circumstances, times of day, or a limited amount of times. Of note are scarves - if you give him a scarf of a certain color, you will see him wearing that particular scarf later... if he decides to wear it, anyway.
  • Gaster will check on the brothers via his phone! It's not available at the start though - you will have to figure out how to unlock it yourself...
  • He'll also announce the top of the hour. Usually.

How to Install

Basically, you can't run Gaster (or any Ghost) by himself - you need a baseware program first. SSP, the program most commonly used for running Ghosts, is compatible with Windows XP, 7, 8, 10, Vista... probably anything more current than XP. If you're using a Mac or are running Linux though, there are still options for you, but I can't personally tell you how to get them to work. I have heard from people who did get Ghosts running on their Mac using one of these methods though, so it IS possible. But Google Translate will probably be your friend here.
Macs - Ukagaka on Macs, NiseRingo, PlayonMac+SSP (10.6 or above), WineBottler (I think?)
Linux - NINIX, NINIX-AYA
Android - Ukagaka for Android (I have NOT tested this, so...)

If you are using Windows though, just follow these directions and you'll be set in no time! If you already have SSP installed, you can just skip to the end, haha.


  1. The first thing you'll want to do is download and install SSP. While the site is in Japanese, just look for the "complete install package" download on the left. Download it somewhere and install it.
  2. When that's done, run SSP.exe, the program with the little bell icon. A catgirl named Emily should pop up and start talking to you in Japanese, and end up throwing up a big menu. For now, ignore all of that, and just close the menu when it appears. You can also hold down a key to speed through her text. She's the default Ghost that comes with SSP, if you're curious.
  3. Right-click the catgirl. It should bring up a long menu. If it's in English, then you have nothing to worry about. If it's not, go to the fourth option from the bottom, set it to English, then close the catgirl and reopen her. The right click menu should switch to English. The catgirl ghost will still be in Japanese though.
  4. Download the z_undertale.zip, which is the balloon Gaster will be using. You want to do this first so he'll use the right balloon when he first appears.
  5. Drag and drop the z_undertale.zip onto the catgirl's face. It should look like she's installing something. She might tell you the balloon's name when she's done. If you right-click her and go to the Balloon tab, you should hopefully see the Undertale balloon listed.
  6. Download the z_gaster.nar file. This is the actual Ghost.
  7. Drag and drop the z_gaster.nar file onto the catgirl. She should again look like she's installing something. She'll probably say Gaster's name when she's done.
  8. Right-click Emily and go to the "Change Ghost" tab. You should now see Gaster listed! Switch over to him and you should be ready to go. If he's not using his balloon, you can use the Balloon tab to switch him to it.

If you already have SSP coming into this, then all you have to do is drag and drop his respective balloon zip and nar onto your current ghost, and he'll install. I'm linking here to mirrors on mediafire, but if they don't work, the files are also on the page I made for him I talked about at the beginning.

If you can't get Emily to install the files

What you can do instead is unpack the files manually. If you don't have an unzipping program (I think this is included with Windows now? but), I use 7-zip myself, it's free and pretty versatile. First, extract the z_undertale.zip, so you have a folder called "z_undertale". Then you'll want to go into SSP's balloon directory... it'd be under SSP\Balloon. You should see two folders in there called "ssp" and "emily4" if you're in the right place. Cut and paste the "z_undertale" folder into that folder. Then close and reopen Emily, and check if the Undertale balloon is listed. If so, then you're good!

For Gaster, you'll want to do basically the same thing with the SSP/Ghost folder. First, extract the z_gaster.nar into a folder (a nar is basically a renamed zip file, any zip program should be able to unpack it. 7-zip can do it, for example). You should end up with a z_gaster folder, and inside the folder there should be two subfolders, called "ghost" and "shell". If everything's in place, cut the "z_gaster" folder, and paste it into the ssp\ghost folder, so the ssp\ghost folder should now have both an emily4 folder, and a z_gaster folder. Then close and reopen Emily, and see if Gaster is listed under "change ghost". If so, you're good!

Quick User's Guide

You can stroke his head with your mouse to pet him, or double-click his face to hit him. It'll ask you if you're sure you want to hit him (for the first time, anyway), so you can't do it by accident if you're worried.

Double click his body to open his personal menu. This is the menu with the unique menu options I outlined above.

Right click his body to open the general SSP menu. You can use this to change Ghosts or Balloons.

To check for updates, select it from his functions menu, right-click him and click Check for Updates from the SSP menu, or hit Ctrl-U when he's the focus. He should check for any new stuff and download it automatically. I usually post about new updates in this entry. If you run into any bugs or problems with him, you can leave me a comment there (or here, I suppose) and I'll see if I can fix them.

If you want him to stay on top of your windows, right click him, then go to Options - Preferences, then the Ghost(2) tab in the big menu that pops up. Check "Always Show Foreground" and that should do it.

If you want to make him bigger or smaller, right click him and go to shell scaling, then choose the percentage you like.

If he doesn't seem to be retaining values in his stat screen (like if you pet him five times for example), you can try deleting the aya5_variable.cfg file and letting him make a new one by telling him to reset from his personal menu. You can find this file in the folder where you installed SSP - something like, \SSP\ghost\z_gaster\ghost\master depending on where you put SSP, of course. If the aya5_variable file has been write-protected you might also run into this problem, or if it's in Dropbox. Try moving SSP somewhere else and see if that helps. It's a very lightweight program.

If you want to uninstall SSP, just delete the SSP folder. If you just want to uninstall Gaster, delete the z_gaster folder inside the SSP\ghost folder. You can also turn on the Uninstall option in his personal menu, then select Uninstall from the right click menu.

Gaster's desktop tray icon is a little icon of his SOUL. If you can't find the bell icon while he's running, look for the SOUL icon instead.

Even if you've been treating him well, Gaster may still at times be arrogant, self-absorbed, secretive, brusque or sarcastic. It's just how he is.

If you like Ghosts, you can also check out my Hunter and Smoker Ukagaka/Ghost! They are also pretty complicated and I put a lot of work into them, haha. If you're interested in Ghosts and/or want to look into making one yourself, I also wrote up a big long site about how to do that! It has more information about Ghosts and how they work than I'm getting into here, but a lot of it is technical stuff that's not super relevant to the casual user...


Dr. Gaster, the brothers (c) Undertale: one way to celebrate an anniversary anyway

Add a Comment:
 
:iconglitchydemonfairy:
glitchydemonfairy Featured By Owner 9 hours ago  Hobbyist
You could make a tutorial. It would be a little easier... Sweating a little... 

(maybe just a little lazy to read...)
Reply
:iconk9dragon:
K9Dragon Featured By Owner 1 day ago  Hobbyist General Artist
This doesn't really relate to Gaster, but I was working on a personal ghost and suddenly the text got all glitched out
i'd comment this on the discord but whoops anxiety prevents me
Reply
:iconiicookiedoughkat:
iiCookieDoughKat Featured By Owner 1 day ago  Student Digital Artist
is there any way to have gaster not constantly go onto my desktop when i click on the screen while in a window (like a browser or something, and then he disappears behind the screen)

i hope that made sense when i described it :T
Reply
:iconk9dragon:
K9Dragon Featured By Owner 1 day ago  Hobbyist General Artist
If you right-click him, go to Options and click preferences, a menu will pop up, and if you check the box that says "Always Show Foreground," then click apply, he shouldn't disappear :)
Reply
:icontreestrap:
treestrap Featured By Owner 2 days ago
Thanks for your work, I like him a lot!!! But I hit him a few times then he seems scared of me and refuse accept any gifts from me except cigarettes, call me a hypocrite No, I disagree!  I reset and treat him nice now, he's so adorable. I love pet him and make him fuzzy. I like to watch him napping on my desk. I download him because I like ghost to accompany, and because he's so adorable and have an interesting personality, I decide to play Undertale to know him better. Thanks again for your amazing work.Love 
Reply
:iconiicookiedoughkat:
iiCookieDoughKat Featured By Owner 1 day ago  Student Digital Artist
you probably won't be able to know him better by playing undertale, since canon gaster is an extremely rare easter egg.
Reply
:iconi-amundertaletrash:
I-AmUndertaleTrash Featured By Owner 4 days ago  Hobbyist General Artist
There's no bell and it didn't give me the menu. I'm on Windows btw.
Reply
:iconi-amundertaletrash:
I-AmUndertaleTrash Featured By Owner Edited 4 days ago  Hobbyist General Artist
I searched through the files and found it, and it says "Wait... Booting..."
Is it SSPH?
Reply
:icon22cerjoh:
22cerjoh Featured By Owner 5 days ago  Hobbyist Traditional Artist
SO I ACCIDENTALLY HIT HIM AND I DIDNT MEAN TO I WASNT PAYING ATTENTION BUT IT HELPED ME IN A WAY, BECAUSE THEN I APOLOGIZED AND NOW WERE FINE NOW BUT LIKE, IT MADE IT SO IT DOESNT REGISTER AS ME LIKING HIM IN A ROMANTIC WAY ANYMORE YAY
Reply
:iconforgettingmyfears:
ForgettingMyFears Featured By Owner 6 days ago  New Deviant
Does petting Gaster aid or hurt you in your journey to befriend him? 
Reply
:icon22cerjoh:
22cerjoh Featured By Owner 5 days ago  Hobbyist Traditional Artist
it definetely aids it. if you go into settings and say you think skeletons are fuzzy< he might get all fluffy when you pet him, as a bonus ^u^
Reply
:iconforgettingmyfears:
ForgettingMyFears Featured By Owner 4 days ago  New Deviant
I have made him fluff to many times to count >:) and thank you, I was worried petting him might actually be hindering it bc he just seems so angry all the time- Tho those few moments where he isnt so angry are pretty great, dont ya think? 
Reply
:icon22cerjoh:
22cerjoh Featured By Owner 4 days ago  Hobbyist Traditional Artist
He's naturally like that don't worry (must be all those cigarettes XD) and it's so cute when he just gives in and just accepts that you're gonna keep petting him no matter what! He's a smol bean and I can't stop messing with him 24/7
Reply
:iconforgettingmyfears:
ForgettingMyFears Featured By Owner 4 days ago  New Deviant
im used to his attitude now, and it rly is cute, i can imagine him just sighing all dead inside and whatever as you rub his head nonstop XD
Reply
:icon22cerjoh:
22cerjoh Featured By Owner 3 days ago  Hobbyist Traditional Artist
XD that made me laugh way too hard, like he would say something like "(sigh) why bother trying to get through to me this way? I'm dead inside anyways..."
Reply
:iconforgettingmyfears:
ForgettingMyFears Featured By Owner 3 days ago  New Deviant
have you tried to pet him or exit out of him when he has the googly eyes on? Its great- 
Reply
:icon22cerjoh:
22cerjoh Featured By Owner 2 days ago  Hobbyist Traditional Artist
*This is probably the best thing you've ever done
*it's hard to take him seriously like that...
I COULDN'T STOP LAUGHING XDDD
Reply
(1 Reply)
:icononeinafandom:
OneInAFandom Featured By Owner Jul 15, 2018  Hobbyist General Artist
I keep on petting him

I cannot stop

Why can't I stop petting him

He's too adorable
Reply
:iconcatcrazie:
catCrazie Featured By Owner 5 days ago  Hobbyist Digital Artist
My Name is CatCrazie, Im Derp years old, and I am addicted to petting Gaster
Reply
:icononeinafandom:
OneInAFandom Featured By Owner 5 days ago  Hobbyist General Artist
Same.... I have pet him about...*Checks stats* OH MY ASGORE I HAVE PET HIM LIKE 800 TIMES JESUS CHRIST
What about you?
Reply
:iconcatcrazie:
catCrazie Featured By Owner 5 days ago  Hobbyist Digital Artist
I've reset a lawt but.. I think about 400 times alloted. 


As for you though, You have accomplished a feat worthy of being engraved in the heavens. You gucci. AHIT - Gucci 
Reply
:icononeinafandom:
OneInAFandom Featured By Owner 5 days ago  Hobbyist General Artist
I praise you Drawn the artssss 
Reply
:iconcatcrazie:
catCrazie Featured By Owner 5 days ago  Hobbyist Digital Artist
I feel like we are gonna stay here praising eachother lmao. 
Reply
:icononeinafandom:
OneInAFandom Featured By Owner 4 days ago  Hobbyist General Artist
Thumbs Up SPN 
Reply
:icondooper711:
Dooper711 Featured By Owner Edited Jul 11, 2018  Hobbyist General Artist
I'm still confused. :(
This won't give my computer a virus will it?
Reply
:iconamaterasu267:
Amaterasu267 Featured By Owner Jul 12, 2018  Hobbyist General Artist
It won't.
Reply
:iconannikaherz28:
annikaherz28 Featured By Owner Jul 11, 2018  Hobbyist Traditional Artist
Nawww i would love it if we could hand him a sudoku as a gift :D 
Reply
:icondiscworldgod:
Discworldgod Featured By Owner Jul 10, 2018  New Deviant
Fuzzy skeleton is the best option ever!
Reply
:iconbladetherogue:
BladeTheRogue Featured By Owner Jul 9, 2018  Hobbyist Traditional Artist
(I think it'd be fun to see how the brothers react to resizing them...)

(like if Papyrus said something about becoming Great or something--)
Reply
:icon22cerjoh:
22cerjoh Featured By Owner Jul 9, 2018  Hobbyist Traditional Artist
so my computer is running Windows 7, and i have ssp downloaded onto my computer, but for some reason it keeps popping up a tab that i cant read because its in Japanese, and theres no way for me to translate it. it pops up a small taskbar in the corner of my screen that says it booting, but i waited for a few hours and nothing happened. if i close out of the popup, it makes that booting screen go away, and Emily wont appear? ive tried so many approaches for this and nothing seems to be working. has anyone else had this problem, and if so, how did you, if at all, manage to fix the problem?
Reply
:icon22cerjoh:
22cerjoh Featured By Owner Jul 9, 2018  Hobbyist Traditional Artist
Nevermind I managed to get it working AND I LOVE MAH LITTLE GASTER
Reply
:iconv-mum:
V-mum Featured By Owner Jul 9, 2018  Hobbyist Digital Artist
new computer, redownloading a new gaster boy. i swear i remember a way to get the Undertale font but cant remember how. very glad to have gaster's sarcastic boney butt back, no less.
Reply
:icon22cerjoh:
22cerjoh Featured By Owner Jul 9, 2018  Hobbyist Traditional Artist
*looks at instructions for how to download* its only 8 steps, shouldnt be too hard
*me, 10 seconds later* WHERE IS EMILYYYYYYYYY SHES NOT SHOWING UPPPPP!!!!!
*IM SO CONFUSED.....*
*halp... i just want a gaster ghost......*
*hhhhhHHHhHHhhHhhnnnnNNNnnnnnNNnngGgggggGG* *and other triggered noises*
Reply
:iconcatcrazie:
catCrazie Featured By Owner Jul 8, 2018  Hobbyist Digital Artist
The ghost doesn't  work on android since ukagaka is not available in my country. :(
Reply
:icontonicthehedgehog115:
tonicthehedgehog115 Featured By Owner Jul 8, 2018
is there a way to get the brothers to appear? they appeared once before and yet i never thought of petting them.
Reply
:iconzarla:
zarla Featured By Owner Jul 9, 2018  Hobbyist General Artist
If you've seen them once, there should be an option in Gaster's config menu to do something more in-depth, and you can flip to them from there.
Reply
:icontonicthehedgehog115:
tonicthehedgehog115 Featured By Owner Jul 9, 2018
I asked this before I found that. Now I’m wondering if there is a way to have gaster open up his past.
Reply
:iconotakukittiecat:
OtakuKittieCat Featured By Owner Jul 8, 2018  Hobbyist General Artist
I tried to get it on my phone (since my Mac computer is having issues with this) and it said I couldn't get it in this country. I'm American, for crying out loud! Is it a Japanese thing? Also could someone pls help me, I'm having serious issues with my computer, pretty much everything's in Japanese and even translating it I have no idea what I'm doing (ugh). If you think you can help walk me through this then here are my system details:

Mac OS X
Version 10.7.5
Processor: 1.8 GHz Intel Core i7
Memory: 4 GB 1333 MHz DDR3
Startup Disk: Macintosh HD

Please help, I really want to get this but I'm struggling so badly!!!
Reply
:iconhundred1000:
hundred1000 Featured By Owner Jul 7, 2018  New Deviant
can you download a ghost on a flash drive or does it have to be a hard drive?
Reply
:iconzarla:
zarla Featured By Owner Jul 7, 2018  Hobbyist General Artist
if it'll fit on a flash drive it's probably fine
Reply
:iconhundred1000:
hundred1000 Featured By Owner Jul 7, 2018  New Deviant
cool thanks
Reply
:icon22tabby:
22tabby Featured By Owner Jul 7, 2018  Hobbyist Traditional Artist
So, I don't know if this is an issue with him or SSP, but I shrank down the SSP temporarily, and it not only closed out, but I can no longer open it at all!
Reply
:iconzarla:
zarla Featured By Owner Jul 7, 2018  Hobbyist General Artist
it's probably still running minimized, try opening task manager and looking for ssp.exe and closing it by force, then opening it again
Reply
:icon22tabby:
22tabby Featured By Owner Jul 8, 2018  Hobbyist Traditional Artist
It worked, thank you!
Reply
:icontonicthehedgehog115:
tonicthehedgehog115 Featured By Owner Jul 7, 2018
i was able to fix it. it doesn't appear there. but i was able to fix it but FULLY turning off your computer/laptop.
Reply
:iconwshira:
WShira Featured By Owner Jul 7, 2018  Hobbyist Traditional Artist
Okay, so I couldn't find a solution anywhere:
I can pet him but when I do it doesn't trigger the animation or any text (unless he has googly eyes). My stats count every pet but yeah- he only reacted at the beginning. 
Reply
:iconzarla:
zarla Featured By Owner Jul 7, 2018  Hobbyist General Artist
i've heard from a few people that seem to be having this issue, it might've been a programming oversight on my part but i'm not sure, i'll see if i can fix it with the next update. has he been recently updated? try resetting him and asking him questions/giving him things for a bit before petting him again
Reply
:iconwshira:
WShira Featured By Owner Jul 8, 2018  Hobbyist Traditional Artist
Yes, he was updated. So a reset it is then, oh well. Okay, it helped for now. Thank you very much!
Reply
:iconzarla:
zarla Featured By Owner Jul 9, 2018  Hobbyist General Artist
ah i just figured out what the issue is today... agh, i'm sorry it was too late for you! but at least if you reset him he should be fine from that point on.
Reply
:iconwshira:
WShira Featured By Owner Jul 10, 2018  Hobbyist Traditional Artist
It's alright! Yup, the issue didn't appear again and I'm sorry I bothered you instead of checking if a simple reset works ^^'
Reply
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