David Crane’s A Boy and His Blob: Trouble on Blobolonia
Also Known As: Fushigi na Blobby: Blobania no Kiki (JP), A Boy and His Blob: Trouble on Blobolonia (US), A Boy and his Blob: Trouble on Blobolonia (EU)
The game contains a number of unused screens, several of which are completely unique. Most appear to have been removed to make the game shorter (a strange decision, given the game’s already short length). These can be seen in-game by setting RAM address $23 to the desired screen ID (set $24 to the same value or toss a ketchup jellybean to make Blob appear).
Screens D2, D4, D5, and D7 are particularly odd, as they consist of a limerick in various stages of completion. Judging from the slightly suggestive ending, it was likely used to test the screen drawing code and not actually intended to appear in the final game.
Screen FF is identical to the Evil King’s chamber seen in-game, except the Evil King is missing. He does not normally disappear after you dump the vitamins on him, rendering this screen unused.