I'm trying to make Mega Moles animate at the same rate as most other things in the game, and making it so when they're jumped on they fall straight down with a death frame. However looking at the ROM Map I cannot find much relating to Mega Moles at all.
Mega Mole Properties
I think your best bet is to insert the dissasembly of the Mega Mole and tweak the .cfg and .asm files to get what you want. For the first thing you mentioned I think you should check the graphics routine at the asm file, and the second one should be easily changeable via CFG editor.