Groanas Brothers or The Groanas Brothers are a hit band from Monstro City. They are a parody of real-life american band, the Jonas Brothers. They are currently no sigthings of the band on Monstro City but their only known song, Growliwood is available in the music menu on the Underground Disco game.
Of Flimsy Channel fame, these brothers have risen to stardom using actual stars they found in a Growliwood park. Well, that and a little bit of talent.