Ok I know I reserved Mamoswine but I changed it lol
Sceptile @ Sceptilite
Ability: Overgrow
EVs: 4 Def / 252 SpA / 252 Spe
Naive Nature
- Leaf Storm
- Dragon Pulse
- Earthquake
- Hidden Power [Fire]
Talonflame @ Leftovers
Ability: Gale Wings
EVs: 248 HP / 160 Atk / 92 SpD / 8 Spe
Careful Nature
- Swords Dance
- Will-O-Wisp
- Brave Bird
- Roost
Sceptile can practically sweep this team bar the priority from Scizor and Dragonite. Talonflame lures in and weakens Hippowdon for itself, while having the ability to whittle Raikou pretty seriously since Thunderbolt has a 0% chance to KO from full. Talonflame supports Sceptile by weakening Raikou / Dragonite potentially and countering Mega Scizor which can be annoying if it gets a free switch-in after a Leaf Storm kill. Raikou can't exactly check Mega Sceptile by switching in, it needs a free switch, but does check it then.
252 SpA Raikou Thunderbolt vs. 248 HP / 92+ SpD Talonflame: 296-350 (82.4 - 97.4%) -- guaranteed 2HKO after Leftovers recovery
252 SpA Mega Sceptile Hidden Power Fire vs. 248 HP / 40 SpD Mega Scizor: 272-324 (79.3 - 94.4%) -- guaranteed 2HKO
252 SpA Mega Sceptile Leaf Storm vs. 0 HP / 0 SpD Assault Vest Raikou: 153-181 (47.6 - 56.3%)
0 Atk Mega Sceptile Earthquake vs. 0 HP / 0 Def Raikou: 198-234 (61.6 - 72.8%) -- guaranteed 2HKO