Hi! Assuming you're talking about kriiks? I grabbed this from the FAQ here! kriiks.com/faq
Kriiks can be obtained through official adopt sales or customs from Kirwick or other Guest Artists, raffles, or from other users if they are trading/selling/gifting their Kriiks.
Kirwick will also raffle or sell occasional MYO (Make Your Own) kriiks in the Kriiks Discord server and website.
All official sales happen through the Kriiks Discord! There's an invite link in kriiks.com home page :3