Who is this guy?  It's Goldar, from Mighty Morphin Power Rangers.  He served an intergalactic sorceress named Rita Repulsa.  He was very loyal to her, and he often beat up the Power Rangers in the first season.....that is, when he fought the Rangers themselves.  But when he fought them in their Megazord, he didn't seem to do as well.  How about that?  When Lord Zedd came along, Goldar turned on Rita and served Zedd.  Even in the second season, he didn't do too well fighting the Rangers either.  Then when Rito Revolto came along, Goldar seemed to lose his intelligence.   Saban did not keep him in character at all.