Pokémon with "Psy Power 3"? No Such Move Exists—Here Are Similar Moves

There is no move called "Psy Power 3" in any Pokémon game. You may be thinking of:

• Psychic – 90 BP, Special, may lower Sp. Def (Gen 1+).
• Psyshock – 80 BP, Special but targets Defense (Gen 5+).
• Psystrike – Mewtwo signature, 100 BP, targets Defense (Gen 5+).
• Psybeam – 65 BP, may confuse (Gen 1+).
• Stored Power / Power Trip – Scale with stat boosts.
• Psychic Terrain – Field effect, not an attack.

If You Meant an Ability or Item

• Psychic Surge (Ability) – Sets Psychic Terrain on entry.
• Psychic Seed (Item) – Boosts Sp. Def on Psychic Terrain.

Clarify the exact name, generation, or context (main series, GO, Masters, etc.) for a precise answer.