Super Mario Bros. 3 (NES): Beta/Unused objects and unused enemies

Codes down below in the description.
Super Mario Bros. 3 still has a lot of unused objects and enemies left in the game. Some of them finished, some of them completely scrambled and incomplete, some of which are actually present in an actual beta / unused levels in the game.
Information source:
tcrf.net/Super...
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Codes used:
Modify address 7B4A's value to ** (02, 04, 05, 0A, 1C, 21, 22, 23, 88, B3, B7 used for **): Replacing the enemy data of the first Koopa Troopa in World 1-1.
KKKZSPIU: Debug mode on the NES version of Super Mario Bros. 3.
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