Forewarn — Pokémon Ability

Reveals the opponents' strongest move upon entering battle.

Effect notes

When this Pokémon enters battle, it reveals the move with the highest base power known by any opposing Pokémon to all participating trainers. In the event of a tie, one is chosen at random. Moves without a listed base power are assigned one as follows: Power | Moves ----: | ----- 160 | One-hit KO moves: Fissure, Guillotine, Horn Drill, and Sheer Cold 120 | Counter moves: Counter, Metal Burst, and Mirror Coat 80 | Variable power or set damage: Crush Grip, Dragon Rage, Electro Ball, Endeavor, Final Gambit, Flail, Frustration, Grass Knot, Gyro Ball, Heat Crash, Heavy Slam, Hidden Power, Low Kick, Natural Gift, Night Shade, Psywave, Return, Reversal, Seismic Toss, Sonic Boom, Trump Card, and Wring Out 0 | Any such move not listed

In-game descriptions by version

diamond pearlDetermines what moves the foe has.
platinumDetermines what moves the foe has.
heartgold soulsilverDetermines what moves the foe has.
black whiteDetermines what moves a foe has.
black 2 white 2Determines what moves a foe has.
x yDetermines what moves an opposing Pokémon has.
omega ruby alpha sapphireDetermines what moves an opposing Pokémon has.
sun moonWhen it enters a battle, the Pokémon can tell one of the moves an opposing Pokémon has.
ultra sun ultra moonWhen it enters a battle, the Pokémon can tell one of the moves an opposing Pokémon has.
lets go pikachu lets go eeveeWhen it enters a battle, the Pokémon can tell one of the moves an opposing Pokémon has.
sword shieldWhen it enters a battle, the Pokémon can tell one of the moves an opposing Pokémon has.
scarlet violetWhen it enters a battle, the Pokémon can tell one of the moves an opposing Pokémon has.

Pokémon with this ability