Jr. Pac-Man (Arcade)
A whole bunch of unused toys (this game's equivalent of prior games' fruits): a skateboard, a cowboy hat (which appears twice), a rattle, a baby bottle, a pogo stick, and a pacifier. These are almost certainly leftovers from the game's earlier "Pac-Baby" (not to be confused with the separate 1982 game Baby Pac-Man) phase of development.
Early (or otherwise alternate) unused graphics of the drum set and cat, which differ slightly from the ones used in-game.
Two large circles, purpose unknown.
An unused Yum-Yum, seemingly meant for the title screen.
Part of Namco's logo. a leftover from Pac-Man (which some of this game's graphics were copied directly from).
The key "fruit" from Pac-Man.
A tiny X, used as padding in the game's graphics.
Towards the end of the data is a portion of what seems to be source code:
MAP LIST BABYMAP LOAD BABYCODE DEBUG LOCATE SPIN,RANGE(9F20,9FFF) LOCATE SCROLL,RANGE(9800,BFFF) LOCATE GOVER,RANGE(9800,BFFF) LOCATE SUBS,RANGE(9800,BFFF) LOCATE BABYMAZE,RANGE(9800,BFFF) LOCATE MAZE0,RANGE(9000,9469) LOCATE MAZE1,RANGE(A000,BFFF) LOCATE MAZE2,RANGE(A000,BFFF) LOCATE MAZE3,RANGE(A000,BFFF) LOCATE MAZE4,RANGE(A000,B
As with the unused toys, the multiple "BABY"-labeled codes likely relate to the game's "Pac-Baby" development phase.
The final sprite of the cat has a thick outline around it, but it is blacked out due to the color palette used. This is what the graphic would look like with the outline enabled (colored blue).