View attachment 183815
Metagross @ Electrium Z
Ability: Clear Body
EVs: 76 HP / 252 Atk / 180 Spe
Adamant Nature
- Meteor Mash
- Earthquake
- Stealth Rock
- Thunder Punch
Blastoise normally want to switch into metagross to spin the rocks as fast as possible. It has Nothing to fear in generell unless Metagross is one of the rock Explosion Suizide sets. But even Explosion sets aren't that bad for Toise because it's outspeeding anyway. Electrium-Z can do a nearly clear Kill to Blastoise.
252+ Atk Metagross Gigavolt Havoc (140 BP) vs. 0 HP / 4 Def Blastoise-Mega: 294-346 (98.3 - 115.7%) -- 87.5% chance to OHKO
Furthermore, Metagross can lure Slowbro, Milotic, Mandibuzz, Golisopod, Araquanid, Mantine you normally only have toxic for. So you don't really miss Toxic.