Super Maruo is the touching story of a man on a quest to reach the woman he loves while being chased by a dog. Notable for being the first commercially sold unlicensed Famicom game. Did we mention it's a porn game?
An unused set of google eyes and mouth shape for the woman.
Several chunks of unused woman graphics.
This unused variant of a pointy thing that's repeated several times in the ROM.
Various strings of text can be found in the ROM, mostly related to development and math functions.
ABCDEFGHIJ SOUND SAMPLE SD NO PAUSE Not Enough Memory ARCTAN unsigned divide by zero REAL long integer math overflow SIN or COS argument range EXP SQRT of LN TRUNC/ROUND TAN ARCSIN or ARCCOS > 1.0 negative to power math underflow stack no room in is invalid allocator interrupted heap non-positive