Rating: 7/10. Build details in description.
This video explains how to roll an NPC team and lock it in to make it permanent:
Mesprit @ Shell Bell
Ability: Levitate
Tera Type: Psychic
EVs: 252 HP / 188 SpD / 68 Spe
Modest Nature
– Stored Power
– Nasty Plot
– Skill Swap
– Calm Mind
Vitamins: 25 HP Up (or Health Mochi), 18 Zinc (or Clever Mochi), 6 Carbos (or Swift Mochi)
Feathers: 2 Health Feathers, 8 Clever Feathers, 8 Swift Feathers
Stats at lvl 100 w/ perfect IVs:
HP : 364
Defense : 246
Sp.Atk. : 270
Sp.Def. : 293
Speed : 213
NPC Advantages: needs 1 intimidator (arcanine, tauros, or staraptor). gardevoir (life dew), bellibolt (light screen), and drifblim (shadow ball) help.
Strategy: skill swap. stored power until your stats reset. if your HP is above 120 (because heat wave missed, gardevoir life dewed, or salamence lost a turn to status condition) do an attack cheer and then a defense cheer. otherwise, do the defense cheer first and then the attack cheer. if you got KO’d before executing both cheers, reset the match. if you still haven’t been KO’d, stored power. if you still haven’t been KO’d after that, reset the match. wait for your stats to reset a 2nd time (most likely will happen before you respawn). 2x calm mind, 2x nasty plot. terastalize ASAP. terastalize ASAP. stored power to victory.
Pros: tera type matches base type, good defense stat, great HP and special attack stats, excellent special defense stat, outspeeds salamence before it uses dragon dance. immune to earthquake (due to Levitate ability). no weaknesses. skill swap removes moxie from salamence. calm mind buffs special attack 1 stage and special defense 1 stage. nasty plot buffs special attack 2 stages. stored power deals STAB damage (tera-boosted when terastalized). its base power is 20 + (20 * # of positive stat stages), which is 140 at +6 SpAtk. shell bell heals when attacking, an amount equal to 1/8th of damage dealt.
Cons: tera type not supereffective, outsped by salamence after it uses dragon dance. can’t debuff special defense.