I've finished a bunch more scenes from my Naruto vs Sasuke animation and figured I'd post a short shot with a little step-by-step process explained! It's not much, but I hope it helps.
As you can see above, I have 3 separate animations at different stages of the process. Here’s a breakdown:
 I always start out with a scribble test to get the general idea of what I’m doing. It’s ugly, it’s dirty, but it’s a very important first step! You never want to start out straight in to detailed drawings with animation. Make sure you’re happy with the motion first, then worry about good drawings.
 I then did up a naked mannequin rough to figure out what I’m doing with the body. No details on the face or clothes yet, just want to make sure I have my general proportions and anatomy where I want them. I also worked out a lot more of the motion. I made tweaks in the final, but I’m setting things in stone here.
 Finally, I dress it up, tie it down. If you look closely, different parts of Naruto’s body are different colors. This is because I worked in passes. In cases with this many moving parts, it’s best to focus on one thing at a time for the best motion. First, I started out with his clothes. This allowed me to experiment with how I had the cloth flapping around in the wind without worrying about the rest of what’s going on. After that, I worked out the hands and face. Getting the volumes of the face right can be a bit tricky when turning it in space, but there’s a few tricks I might do another little tutorial gif on in the future. Finally, I did the hair then bandana in a similar fashion as the clothes.
Hope that’s helpful to some folks! Let me know if you have any questions!
but I have two questions bothering me.
Do you recommend to re-draw every frame even if is slightly different? Like for example in a simple dialogue only the jaw goes down when speak. I'm not sure when you should "recycle" drawings for saving time without it feels unnatural.
And: any tips for making the clean-out lines straight and smooth? Sometimes I have problems with the thickness because of the pen's pressure when joining lines and the animation looks too sketchy...
thank you a lot for this tut!
To answer your questions: 1) NOPE! Unless you're doing Disney style traditional animation with $100,000,000 budgets, you're probably going to have a lot of held drawings. That means, you animate characters in to a pose, then hold them there for a while. For a lot of dialog sequences, it's recommended that you only animate the mouth (and likely jaw) once you get in to a held position. How often you "recycle" or reuse drawings depends largely on the budget of the project. For super low budget projects, reuse becomes a necessity. For higher budget projects, you can do more and more unique drawings and overall animation.
I often work in Flash, so for clean lines, I can use smoothing tools to fix up my janky lines. In Photoshop, I generally make broad, quick strokes to counteract the shaky sketchy lines i might get, then erase away any overlapped lines I might have from overshooting.
Hope that helps some!
Thank you for the answer, you saved my sanity jaja xDDD
I'll try to do that and put it into practice! Again thaaanks~
Keep doing that great job, I'd love to see more!