Before the Pizza Priest and Stupid Rat were created, some transformations had unique objects associated with them, two that would've taken a similar role to the priest are in the game's files:
• A tombstone, which would turn Peppino back from a ghost
• A pile of corn, which would distract Mort and free Peppino from him, referencing how corn was used as a health pick-up in Mort the Chicken
and some blocks that could only be broken by transformations, like the rat, also remain in the files
• A barrel block
• A hot metal block, which would be destroyed by both knight and rocket transformations
• A ball block
• A Gustavo and Brick block