Quick recap
A five-episode mini-arc. Beerus learns that Monaka, whom everyone believes is incredibly strong, is really just an ordinary delivery guy, and Goku unknowingly fights him in a costume to keep the secret. Then Goku, Vegeta, Goten, Trunks and Bulma travel to a distant planet, Potaufeu, in search of a legendary gem. There, a substance that copies whatever it touches creates a clone of Vegeta, with his power and memories, and the original starts fading away while the copy exists. Goku and Vegeta battle the fake Vegeta, who grows stronger with every fight, and only the real one's determination destroys the copy.
No spoilersOpens once you mark the title as seen.