Go-Rock Quads (Enigma Shadow)

The Go-Rock Quads are a four-member rock band that first appears in Pokémon XD^3: The Waves of Truth. They are made up of four siblings, Billy, Garret, Clyde and Tiffany.

Billy
Billy (JP: Yarai) is the eldest of the four siblings and thus, the leader of the Go-Rock Quads. He is voiced by Bjorn Ulvaeus.

As the oldest member of the group, Billy plays lead guitar in their act. He also provides vocals for some songs, though most of them are handled by Tiffany. He is considered their leader in all aspects, though most of the time, the members of the group do what they please independently of each other.

In addition to performing, Billy is the chief operator and founder of the Go-Rock Frontier in Aquane.

Songs sung
-Why Did It Have To Be Me? -Rock'n'Roll Band

Garret
Garret (JP: Yuuki) is the second oldest member of the Go-Rock Quads, older than Clyde and Tiffany but younger than Billy. His voice actor is Benny Andersson.

Garret plays acoustic guitar for his band, backing Billy's electric lead. He does, however, refuse to sing, and is only known to have contributed light backing vocals to a small handful of songs.