Slow Start — Pokémon Ability

Halves Attack and Speed for five turns upon entering battle.

Effect notes

This Pokémon's Attack and Speed are halved for five turns upon entering battle. This ability also takes effect when acquired during battle. If this Pokémon loses its ability before the five turns are up, its Attack and Speed return to normal; if it then regains this ability without leaving battle, its Attack and Speed are halved again, but the counter keeps counting from where it was.

In-game descriptions by version

diamond pearlTemporarily halves Attack and Speed.
platinumTemporarily halves Attack and Speed.
heartgold soulsilverTemporarily halves Attack and Speed.
black whiteTemporarily halves Attack and Speed.
black 2 white 2Temporarily halves Attack and Speed.
x yTemporarily halves the Pokémon’s Attack and Speed stats.
omega ruby alpha sapphireTemporarily halves the Pokémon’s Attack and Speed stats.
sun moonFor five turns, the Pokémon’s Attack and Speed stats are halved.
ultra sun ultra moonFor five turns, the Pokémon’s Attack and Speed stats are halved.
lets go pikachu lets go eeveeFor five turns, the Pokémon’s Attack and Speed stats are halved.
sword shieldFor five turns, the Pokémon’s Attack and Speed stats are halved.
scarlet violetFor five turns, the Pokémon's Attack and Speed stats are halved.

Pokémon with this ability