>>31761821Megamence and Aegislash are straight up broken in the Battle Tree. They also happen to have incredible type synergy with one another. They can PP-stall out any Rock/Ground coverage using Pokemon, of which there are many. Be sure not to Megavolve Mence until you're ready to setup and sweep with it, as it's Intimidate-swap power with Aegislash is key.
Salamence @ Salamencite
Ability: Intimidate
EVs: 244 HP / 126 Atk / 140 Spe
Jolly Nature
IVs: 5 IV
- Return
- Roost
- Substitute
- Dragon Dance
Aegislash @ Leftovers
Ability: Stance Change
EVs: 252 HP / 252 Atk / 4 Def
Brave Nature
IVs: 4 IV, 0 Spe
- Shadow Sneak
- Sacred Sword
- King's Shield
- Sword's Dance
Salamence can get away with having only a single attacking move as Flying has no immunities, and enough DDance spam will let you even break through the sturdiest resisting walls, like M-Steelix, Aggron and the like. Substitute + Roost are key for longevity and status absorption, also lets you survive bullshit crits which inevitably happen in the Tree.
244 HP EVs on Mence let you hit 201 HP, the un-even amount of HP lets you use Substitute 4 times instead of 3 times. 140 Speed and Jolly nature let you outspeed essentially every threat at +1 speed.
King's Shield + Intimidate swapping will turn any physical attacker into set-up fodder, watch out for Defiant and Clear Body Pokemon.
The key to Multi-battles is your AI partner. Grind out single/double battles, anytime you find an opponent who had good Pokemon be sure to scout them. If you scout the same trainer twice, the most recent team will override the old one.
Wally and Cynthia are A-tier, Colress is S-tier.
You'll want Garchomp + else from the first two, and M-Metagross + Porygon2 from Colress. Special trainers pull from a specific pool of sets for their Pokemon, find them on bulbapedo or elsewhere.
The key it not having sets with many/any non-attacking moves. They will use them at inopportune times wasting crucial turns.