>In battle
Rivalry raises the base power of a move by 25% if the foe and the user have the same gender, but reduces base power by 25% if the foe and the user have opposite genders.
If the user or the foe is genderless, the move's base power is unaffected.
It would not work on a DS because the game is programmed So if the user is genderless it would not get the boost.
////Jofly