Moeyo Butaman (燃えよ ぶたマン!?) is a cancelled NES / Famicom game that was in development in 1992 and it would have been published by Sigma Enterprises. Only a couple of (tiny) scans from old japanese gaming magazines remain to remember the existence of this game.
The main protagonist was going to be some kind of super-hero pig, and as noted by GDRI gameplay could have been similar to Time Zone, another action platformer published by Sigma in 1991.
Characters designer for Moeyo Butaman was Gen Sato – a designer / animator who also worked on “Suishou no Dragon” with Squaresoft and on many anime – who seems to have a playable cart of Moeyo Butaman in his personal collection.
We can only hope that one day he could dump the game to preserve it from being lost forever.