Some Pokémon needs buffs right? Here's how I play it out.

Camerupt - 20+ HP
Mega Camerupt - 20+ HP

Sharpedo - 10+ Defense and Sp. Defense
Mega Sharpedo - 10+ Defense and Sp. Defense

Aerodactyl - Gets Accelerock and Head Smash

Onix - 20+ Attack

Steelix - 20+ Attack
Mega Steelix - 20+ Attack

Pidgeot - Gets Focus Blast

Lurantis - Gets Superpower and Chlorophyll

Lycanroc - Gets Earthquake and Dig

Corrosion now allows Poison-type moves to deal neutral damage to Steel-types.

Water Compaction now makes the Pokémon immune to Water-type moves.

Turtonator - 10+ HP and Aftermath

Bruxish - 10+ Speed

Hakamo-o & Kommo-o - Gets Mach Punch, Close Combat and Drain Punch

Ninetales and A. Ninetales - 20+ Sp. Atk

Marowak - 10+ Attack
A. Marowak - 10+ Attack and gets Shadow Bone upon evolving.

Fearow - 20+ Attack

Primeape - 10+ Speed

Rampardos - Gets Rock Head and Accelerock

Garbodor - Gets Poison Jab

Relicanth - 10+ Attack

Flygon - Gets Quiver Dance

What do you think?