I had 'em all, including the very... stylish Ken with the real hair and the shiny silver coat. Had the cassette tape, and this thing that you put the dolls legs in and moved a lever and they'd "dance".
I had some werid sparkly guitars for two of the dolls, and I remember the Asian doll (Dee Dee or Diva, can't remember which) had a TOTALLY RAD white jacket with rainbow triangles.
As for ripping off Jem, I think Barbie and the Rockers was 1985 or so whereas Jem was 1986. No matter- every toy is a rip off of another, isn't it? I mean I bear no ill will against GO BOTS, or anything. I'm sure Jem and The Holograms and Barbie and the Rockers partied hardy with each other after shows...trashed hotel rooms and got wasted...come on, it was the 80's! It was ALIVE!