I feel so nostalgic while seeing this...it's been a while since last time I've been on newgrounds and this wallpaper pretty much reminded me of all the characters I fell in love with.
It's awesome how you managed to keep the original character design of each one of 'em while adding a bit of your own style to the mix. Nice work!
P.s. I just can't remember the name of the hulkish bearded guy with the axe....Anyone?