Pretty sure Mega Scizor has been done before but ...
Kyurem-B + Hidden Power Fire
Kyurem-Black @ Life Orb
Ability: Teravolt
EVs: 20 Atk / 252 SpA / 236 Spe
Mild Nature
- Ice Beam
- Earth Power
- Fusion Bolt
- Hidden Power Fire
Mega Scizor can switch in safely on Kyurem-B, who can only 3HKO it at best with its moves. However, Hidden Power Fire allows Kyurem-B to OHKO Mega Scizor on the switch. It is best to do this on the switch because a Bullet Punch severey damages Kyurem-B. However, you can OHKO it if you predict a Roost or Swords Dance.
Kyurem-B + Hidden Power Fire
Kyurem-Black @ Life Orb
Ability: Teravolt
EVs: 20 Atk / 252 SpA / 236 Spe
Mild Nature
- Ice Beam
- Earth Power
- Fusion Bolt
- Hidden Power Fire
Mega Scizor can switch in safely on Kyurem-B, who can only 3HKO it at best with its moves. However, Hidden Power Fire allows Kyurem-B to OHKO Mega Scizor on the switch. It is best to do this on the switch because a Bullet Punch severey damages Kyurem-B. However, you can OHKO it if you predict a Roost or Swords Dance.