“Chupa” (**1/2 out of four) was a modestly likeable children’s drama about a disaffected teenager (Evan Whitten) who visits his family in Mexico and finds a mythical creature hiding in his grandfather’s shed which he develops a strong bond with but a determined poacher (Christian Slater) is actively tracking and attempting to hunt him down. Easygoing performances and some sweet moments between the boy and the creature make this watchable family entertainment but others might find it a tad too similar to “E.T.” and also (to some extent) “Pete’s Dragon.” A change-of-pace for director Jonas Cuaron who previously wrote “Gravity” and “The Shock Detective.”