Goofs

In the episode "In search of the stolen album", Jem and the Holograms get a ransom note. The first line quite obviously reads "In search of good times," but the girls read out loud and then repeat "In search of good tunes."

Holograms are three-dimensional images created with light. Thus, they are not solid objects. Holograms, such as Jem, interact with people and objects in impossible ways (for example, kissing, touching hair, holding a microphone, etc.).

Jerrica and Jem have the same voice, skin tone, facial features, and body structure. Also, they are seen close by in the same locations (albeit not together). Jerrica and Jem have similar personalities, and Jem treats Kimber as her sister (yet Jem should not be related to Kimber).

Rio has been Jerrica's boyfriend for years. He kisses both Jerrica and Jem. Yet, somehow Rio never realizes Jerrica and Jem are the same person.

In multiple episodes Jem calls Kimber her sister, however as Jem she is not related to any of the Holograms, Rio Jerrica's boyfriend would have known this fact being friends with Jerrica and Kimber for years.