Echo is a bright breed of Golem with a Plant sub-type, exclusive to Monster Rancher 1. It is later renamed and slightly redesigned, but it still retains its melon-like body. Its shoulders are a bit mushy, but its skin hardens to a rind-like thickness halfway down.
Monster Rancher 1: Although mostly quiet, it is a terror when it gets angry.
Its name is a mistranslation of the prefix eco-, usually used in reference to helping the environment.