To the Monty Mole before jumping out, Eliminates contact judgments by other sprites, fireballs, cloaks, etc. Even if you press Silver Pow before popping out, it will not become a silver coin.
A pretty nice patch, but with one major flaw: you don't account for the fact that the Monty Mole init routine is called by sprites other than the mole, causing them to have their tweaker bytes changed. Luckily, this doesn't seem to affect most sprites (Creating/Eating Block, Flying Grey Turnblocks, Wooden Spike) with one exception: Lakitu. This patch makes so Lakitu becomes invincible to star/fire/cape, inedible and not interacting with sprites. So, once you make this only affect Monty Moles it can be accepted.