I realized something about anime characters.

that must mean im an anime character

i eat basura comida constantly and im still the weight that you'd expect from a pop star. and its not a fitness thing either; i have a fear of playing sports and im really unfit. so as far as i can tell, it's just genetics (my mum is the same way) and a really good metabolism. im guessing its the same with anime characters like that as well

yep! like Vash XD

Well most anime character that eat a lot are some sort of hero, like goku and Naruto, so they might be considered physically fit. Then there are characters who eat all the time and do nothing, they can be placed in the category of good metabolism.

Conclusion: I have no idea.
*Anime Logic*

l doesn't gain wait due to how much he uses his brain. This pic is so cute :3

yeah, theres l from death note. he's literraly eating cakes sweets thoughout the whole anime and manages to stay skinny, but its becuase he burns calories por using his brain...thinking...-.-

NOT gaining weight is understandable....but how can tu eat so many sweets...and not break a SINGLE pimple, thats just beyond logic -.-

Toriko has an ENORMOUS and almost never-ending appetite and he STILL looks great and healthy as well as, of course, strong and powerful ;)

It just makes me wish that much más that i lived in the anime universe T.T

Well, PSG had a whole episode about that! Stocking, who eats loads of desserts constanty but never gains weight, suddenly had to start going on a diet due to her weight gain.

Maybe it's for comedic reasons. Here's a picture of Konoha from Mekakucity Actors. He eats a lot and never gets fat!