Can Big Show be beaten?
Of course! John Cena beat him at a WrestleMania match (although, I'm not sure if it is a WrestleMania match but I'm sure he beat him at a match..). Other superstars had beat him too!
Beaten is the past participle of the verb beat. The past participle is used to make the present perfect tense: He beat me up (simple past) The man beat his dog. He has beaten me up again. (present perfect). The man has beaten his dog more than once. The past participle is also used to make the passive tense: I was beaten up by the big guy. The dog was beaten by its owner.