Gael García Bernal is great in this entertaining biopic of the eponymous wrestler who rose from Texan oblivion and poverty to international acclaim. We learn fairly early on that he and his mother "Jocasta" (Perla De La Rosa) get by after his father abandoned them by working loads of different jobs and by him taking on the role of an "exotico" - a sort of "glamour" wrestler - in a makeshift garage where his job is to camp things up and then get beaten by a guy twice his size. Aside from the fact that it hurts, he decides that he wants a new home for him and his mum, and that he also has the…