|This article is about a/an ally in Saban's Masked Rider.|
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 gave him a different crystal which was used to transform him into Roborider when Donais yells out the phrase, "Roborider Force!" 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 Super Gold crystal. Donais then returned to Earth to give Dex the power of Super Blue.
- Robo-Accelerator Belt - Roborider's transformation belt. Embedded upon the center of his belt is a green stone. He can charge it for an attack called the Electric Field Maximum Fortage.
- Unnamed Swords - Donais as Roborider has a pair of swords, one with a long blade and the other short.
- Roborider is not to be confused with RX's extra form, Robo Rider, which is known as Super Gold in Masked Rider.
- Nobuhiko Akizuki - Counterpart in Kamen Rider Black RX. See comparison page.
- Joe the Haze - Counterpart in Kamen Rider Black RX. See comparison page.