This is a giant 64x64 Grinder, based on the Non-Line Guided Grinder disassembly by Iceguy. You can set both the X and Y (bouncing) speed of the Grinder on a per-sprite basis, using the extra bytes. Note that the Y speed needs to be a negative value, with $FF being the smallest bounce and $80 being the highest.
Includes graphics for SP3, that overwrite the Net Koopas and Sparky in GFX12.
No More Sprite Tile Limits patch is strongly recommended.