This is going to get out of hand VERY quickly.
Ability: Photovoltaic: Mega-Zapipurr takes no damage from light-generating attacks and instead receives a Special Attack boost.
Light generating attacks would, yes, include basically every fire type move haha. Things like flamethrower, solarbeam, dazzling gleam, etc. All your beams and shit, sky attack, and so on. Also electric moves. No thunder waving here! Try again! It still is weak to poison, bug, and ice.
I don't know if that's even a good ability to have or not but whatever. If anyone has anything better for something with the name Photovoltaic be my guest.
Mega Zapipurr, as I've said before, would receive a huge boost to both its special attack and speed, without making it a total glass cannon.
Megalution symbol ripped by Narkh
Pokemon © Game Freak, Mega Zaipiurr, Zapipurr, and Art © Me.