Complex sentence: This kind of adaptation technique--turning multiple shows into one show--was originally used in anime with shows like "Robotech" and "Voltron", though this was one of the first times this technique was used for a tokusatsu adaptation.
Split into simpler sentences: This kind of adaptation technique, turning multiple shows into one show, was originally used in anime with shows like "Robotech" and "Voltron". This one of the first times this technique was used for a tokusatsu adaptation.