Gymblonski

Summary

Rigby's high school nemesis returns and threatens to ruin his chances at passing gym class and graduating high school.

Guest stars

• David Koechner as Principal Dean (voice)
• Roger Craig Smith as Jablonski / Cheezers Guy (voice)
• Ben Diskin as Aiden / Milton (voice)
• Chelsea Kane as Cheezers Lady / Gum Girl (voice)