Leeku is a minor character from Black: Victini and Reshiram and White: Victini and Zekrom.
Black: Victini and Reshiram and White: Victini and Zekrom
Leeku battled with his Samurott against Ash Ketchum and Ash's Tepig. Samurott was able to deal quite some damage to Tepig but due to power of Victini Tepig received, Tepig was able to defeat Samurott. Because of his loss, Leeku was eliminated from the tournament.