Donais

Donais is sent to earth to give Dex the crystal to enable Dex to harness the powers of Super Gold. Unfortunately, he was kidnapped by Dregon and the crystal was used to transform him into Roborider to fight Dex. This forced Dex to battle his own friend. In the end, Dex helps Donais see that he is Dex's friend and Donais hand over the crystal. Donais then returned to Earth to give Dex the power of Super Blue.