Fred Tatasciore as Gluko / Kitty Num Nums (voice)

James Arnold Taylor as Lennon (voice)

Dana Snyder as Grandma (voice)

Roger L. Jackson as Mr. Sprinkles (voice)

Alex Jayne Go as Little Bubble (voice)

Brendon Small as Pointy Thing (voice)

Artie Esposito as Puppeteer (voice)

Anna Gamburg as Little Bubble (voice)

Denise Gorzelanny as Grandma (voice)

Achim Götz as Gesang (voice)

Karlo Hackenberger as Gluko (voice)

Henrik Ilgner as Gesang (voice)

Matti Klemm as Bubble Monster (voice)

Elias Kunze as Bubble (voice)

Simon Kunze as Bubble (voice)

Jan Makino as Lennon (voice)