Mega being Revolved: Ampharos
New Pokémon Name: Gewenetic
Stats: 100/75/95/135/90/55
Typing: Electric/Fairy
Abilities: Galvanize/Static
Movepool Additions: Moonblast
Niche: Mega Amp the Second. AKA, Mega Camerupt the Third
Mega being Revolved: Houndoom
New Pokémon Name: Helloundum
Stats: 85/90/50/130/80/105
Typing: Dark/Fire
Abilities: Unnerve/Solar Power
Movepool Additions: Sludge Wave, Fiery Wrath
Niche: Specs Sun abuser. Could also run Scarf or Leftovers.
Mega being Revolved: Bannette
New Pokémon Name: Malinionette
Stats: 74/135/85/83/83/65
Typing: Ghost
Abilities: Cursed Body/Disguise
Movepool Additions: Poltergeist, Swords Dance
Niche: It makes Mimikyu obsolete.