From Bulbapedia, the community-driven Pokémon encyclopedia.
Muscle Island (Japanese: ガンガ島 Ganga Island) is an anime-exclusive island in Hoenn, found in between Lilycove City and Mossdeep City. It appeared in Training Wrecks.
The island is most famous for its bodybuilders and people interested in getting into shape. The unique part about the island is that they use Pokémon to help them accomplish this in addition to regular exercise equipment.
When Ash and his friends visited Muscle Island, they were greeted by Rocky, who told them all about the island. After learning about it, Rocky and Ash had a Double Battle while Brock, May, Max and Team Rocket all exercised. At one point, Ash's friends were doing push-ups with Lombre, Skitty and Bulbasaur on their backs.
Pokémon seen on Muscle Island
- The Japanese name of this location, "Ganga Island", is similar to the dub name of Gavin's hometown, Ganga Town.
- The large mountain on the island looks like a muscular arm flexing its bicep, which is most likely how the island got its name.