I studied animation in school and through it I was able to polish my illustration and also apply skills in narrative and story telling from comic books. As a professional I mostly animated video game characters, often in 2D sprite format. I don’t have access to many those animations but I have come across some sprite-rips which I have posted here them here.

Spider-man GBC Spidey sprite samples 
Spider-man GBC Venom sprite samples 
Spongebob: Legend of the Lost Spatula GBC sprite samples 
Spongebob: Legend of the Lost Spatula GBC sprite samples some by Jonathan Russell 
Spongebob: Legend of the Lost Spatula GBC sprite samples some by Jonathan Russell 
Spongebob: Legend of the Lost Spatula GBC sprite samples some by Jonathan Russell