This is what the people behind Smash Bros. draw for fun.
This illustration, tweeted by Smash Bros. director Masahiro Sakurai earlier today, features a whole bunch of characters from the regular cast of Nintendo's brawl series. Sakurai says (via Google Translate) the staff drew it on their office white board.
The hearts in Donkey Kong's eyes are an especially nice touch.
Sora Sakurai [Twitter]