From Wikimon
You're My Rival!!
Activation Timing: Battle Phase
◎You may only place one of this card in your slots; cannot receive the effects of Program cards being 'invalidated' or 'sent to the Dark Area', or 'cannot receive the effects of Option cards'.
Effects: ◎Mark out one of the opponent's Digimon at the same level as your Digimon (it can be a Digimon that is not your current opponent in the Digimon Box). After that, your Digimon when you did the marking out and the opponent's Digimon that you marked out develop a 'rivalry', and the loser of a battle between the two Digimon is stacked onto the point gauge.
◎This card cannot be used when your Digimon is Level III.
◎This card is sent to the Dark Area at the end of the turn when one party gets sent to the point gauge, and when the 'rivalry' is dissolved.
発動タイミング: バトルフェイズ
[効果]: ◎「自分と同じレベルの相手デジモン」を1体指定する(現在デジモンボックスにいる相手以外の名前でもよい)。その後「指定時の自分デジモン」と「指定した相手デジモン」は「ライバル関係」となり、その組み合わせで行われたバトルの敗者はポイントゲージに重ねられる