Hau sent Raichu to battle during the preliminary round of the Alola Pokémon League, which they passed. Hau used Raichu to battle Samson Oak's Exeggutor. Raichu floated around, and used Thunderbolt to electrocute Exeggutor, who endured the attack. Exeggutor used Dragon Hammer to retaliate, but Raichu used Quick Attack to dodge. Thus, Exeggutor was defeated by Raichu's Focus Blast.