Stats, type matchups, abilities, learnset, current usage, and build context for Mega Starmie in Pokemon Champions.

Psychic - status
Raises the user's Speed by 2.
Psychic - status / Priority +2
User and ally swap positions; using again can fail.
Rock - special / 60 BP / 100%
10% chance to raise all stats by 1 (not acc/eva).
Water - physical / 40 BP / 100% / Priority +1
Usually goes first.
Ice - physical / 60 BP / 100% / Priority -4
Power doubles if user is damaged by the target.
Ice - special / 110 BP / 70%
10% chance to freeze foe(s). Can't miss in Snow.
Fighting - status
Raises the user's Attack and Defense by 1.
Electric - special / 50 BP / 90%
70% chance to raise the user's Sp. Atk by 1.
Water - special / 50 BP / 100%
100% chance to lower the target's Attack by 1.
Ghost - status / 100%
Confuses the target.
Psychic - status
Raises the user's Defense and Sp. Def by 1.
Fairy - special / 80 BP / 100%
No additional effect. Hits adjacent foes.
Water - physical / 80 BP / 100%
Dives underwater turn 1, strikes turn 2.
Normal - physical / 120 BP / 100%
Has 33% recoil.
Normal - status / Priority +4
User survives attacks this turn with at least 1 HP.
Psychic - special / 80-120 BP / 100%
User on Psychic Terrain: 1.5x power, hits foes.
Normal - physical / 70-140 BP / 100%
Power doubles if user is burn/poison/paralyzed.
Steel - special / 80 BP / 100%
10% chance to lower the target's Sp. Def by 1.
Water - physical / 60 BP / 100%
User switches out after damaging the target.
Normal - physical / 150 BP / 90%
User cannot move next turn.
Grass - special / 20-120 BP / 100%
More power the heavier the target.
Psychic - status
5 turns: no Ground immunities, 1.67x accuracy.
Steel - physical / 1-150 BP / 100%
More power the slower the user than the target.
Water - special / 110 BP / 80%
No additional effect.
Normal - special / 150 BP / 90%
User cannot move next turn.
Ice - special / 90 BP / 100%
10% chance to freeze the target.
Ice - physical / 80 BP / 100%
Ends the effects of terrain.
Ice - special / 55 BP / 95%
100% chance to lower the foe(s) Speed by 1.
Psychic - status
For 5 turns, special damage to allies is halved.
Water - physical / 85 BP / 100%
20% chance to lower the target's Defense by 1.
Rock - special / 120 BP / 90%
Raises user's Sp. Atk by 1 on turn 1. Hits turn 2.
Normal - status
Raises the user's evasiveness by 2.
Rock - special / 80 BP / 100%
No additional effect.
Normal - status / Priority +4
Prevents moves from affecting the user this turn.
Psychic - special / 90 BP / 100%
10% chance to lower the target's Sp. Def by 1.
Psychic - physical / 70 BP / 100%
High critical hit ratio.
Psychic - special / 80 BP / 100%
Damages target based on Defense, not Sp. Def.
Water - status
For 5 turns, heavy rain powers Water moves.
Normal - physical / 50 BP / 100%
Free user from hazards/bind/Leech Seed; +1 Spe.
Normal - status
Heals the user by 50% of its max HP.
Psychic - status
For 5 turns, physical damage to allies is halved.
Psychic - status
User sleeps 2 turns and restores HP and status.
Normal - special / 60 BP / 100%
Power doubles if others used Round this turn.
Normal - status
For 5 turns, protects user's party from status.
Water - special / 80 BP / 100%
30% chance to burn the target. Thaws target.
Normal - physical / 200 BP / 100%
Hits adjacent Pokemon. The user faints.
Psychic - status
The user and the target trade Abilities.
Normal - status
User must be asleep. Uses another known move.
Normal - special / 50 BP / 100%
User must be asleep. 30% chance to flinch target.
Normal - status
User takes 1/4 its max HP to put in a substitute.
Water - special / 90 BP / 100%
Hits adjacent Pokemon. Double damage on Dive.
Electric - special / 110 BP / 70%
30% chance to paralyze. Can't miss in rain.
Electric - status / 90%
Paralyzes the target.
Electric - special / 90 BP / 100%
10% chance to paralyze the target.
Normal - special / 80 BP / 100%
20% chance to paralyze or burn or freeze target.
Psychic - status / 100%
User switches its held item with the target's.
Psychic - status / Priority -7
Goes last. For 5 turns, turn order is reversed.
Water - special / 60 BP / 100%
20% chance to confuse the target.
Water - physical / 80 BP / 100%
20% chance to make the target flinch.
Water - special / 35 BP / 85%
Traps and damages the target for 4-5 turns.
Psychic - status
For 5 turns, all Defense and Sp. Def stats switch.
Psychic - physical / 80 BP / 90%
20% chance to make the target flinch.