Jitter's Sprites(Need Critiques)

[Mephisto Maker]

i liked isaac and axel, but i think them could have a bit more of shadow, principally isaac
your portraits is cool but that young link and that mario, don't know, looks like a bad cartoon
yoshi is much close of camera, don't u think?
i think that you need to improve much in line art
your shading is almost perfect