What set is Scizor running? This seems like a pretty important determinant in what teammates we should be running for it. I think a bulky SD would probably work best for the team style we're aiming for, something like:
Scizor @ Scizorite
Ability: Light Metal
EVS: bulky
- Swords Dance
- Bullet Punch
- Roost
- Knock Off / U-turn / Bug Bite
The EVs and coverage move can be specified and customized later. I definitely wouldn't want to run Superpower on it though.
Anyway, thinking of this Pokemon, here are some important areas of support that I think teammates should address:
Offensive
- Stealth Rock
- Pokemon that can pressure Heatran, Rotom-W, Venusaur-Mega, Slowbro (if Knock Off is the coverage move), and to a lesser degree, Ferrothorn, Amoonguss, Skarmory, and Hippowdon
- If U-turn is the coverage move, Rotom-W would make a lot of sense as a partner
- If Knock Off is the coverage moves, Keldeo and especially Heatran become much easier to wear down and exploit
- A fast Pokemon or two who can make up for Scizor's inability to push offensive momentum, especially without U-turn
- Preferably something that isn't revenge killed by Talonflame
- Offensive Pokemon that can exploit choice-locked Magnezone
Defensive
- Very strong coverage for Charizard-Mega (both - preferably a nice initial switch-in), Keldeo, Gyarados-Mega, Talonflame, and Manaphy
- Status Absorption, especially for taking Scald spam, Lava Plume, and Rotom-W's Will-O-Wisp
- Covered in the first bullet, but a very strong Fire resist wouldn't hurt
- Backup checks to Pokemon like Lati@s that commonly carry HP Fire to beat this, especially when they are commonly paired with Magnezone
- Hazard control
Also, I think we will want to take advantage of Scizor's unique strengths:
- As the only hard counter for Metagross-Mega in the game, we have greater freedom in team-building to use things that bait it than other teams do. Something like Clefable might fit really well here for that reason.
- Scizor provides a nice win condition against a lot of bulky teams, so while this is hardly a revelation, pairing it with a Pokemon with a lot of immediate power will really make its job easier.
- Defensively, this can cover for so much. It covers all three Dragon weaknesses and pairs well with an offensive Latios. It can also Knock Off or otherwise wear down checks like Keldeo and Heatran, so a Pokemon like Bisharp could pair nicely if we want to go a more offensive route.
Well, that's off the top of my head. My favorite teammate is Clefable, but I adore Clefable and there may be more optimal choices this early in team building.