This is the Giant Piranha Plant, originally from sprite tool, further adapted by Davros. When extra bit is set, it will be upside-down. Extra Property 1 now controls if the piranha should rise even if Mario is near it, among if the piranha should be sideawys.
1. SA-1 and asar conversion done;
2. Code was HEAVILY optimized:
2.1. The original sprite had two graphic routines, now condensed in one, as the only diference between them was the Y-Flip based on Extra Bit;
2.2. Shortened the speed routine, as it was duped because the Extra Bit behaviour (same as above).
3. Code is now pretty good commented.