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Hey man, so glad you like the characters :D To answer your question: no I don't have any videos or tutorials. I really only do pixel art for fun and for my personal projects so I'm really not any kind of expert on the subject. 

Sorry I couldn't be more helpful, however, I'd be more then happy to drop you some links to some resources that I've found very helpful when making pixel art, just let me know if that would be useful to you.

Cheers!