Harley's Wigglytuff was one of Harley's Pokémon and was notably more aggressive than most members of its species.
Wigglytuff's first appearance was in the Kanto Grand Festival. It battled alongside Harley's Cacturne against May's Eevee and Munchlax, where Harley fully used its capability to expand its rubber-like body. Wigglytuff proved capable of moving in midair and held its own against Munchlax and Eevee after Cacturne was defeated. Wigglytuff was eventually defeated by May's Munchlax's Focus Punch, with the help of Eevee.