Rivalry

In Pokémon ChampionsGen IV

Game

Pokémon Champions

This Pokémon's attacks do 1.25× on same gender targets; 0.75× on opposite gender.

Who has it: 18 Pokémon
Showdown rating

How it works in Champions

This Pokémon's attacks have their power multiplied by 1.25 against targets of the same or multiplied by 0.75 against targets of the opposite gender. There is no modifier if either this Pokémon or the target is genderless.

“The Pokémon's competitive spirit makes it deal more damage to Pokémon of the same gender, but less damage to Pokémon of the opposite gender.”
In-game text, Scarlet & Violet

Pokémon with Rivalry

As a hidden ability