Battle Hopper

The Battle Hopper is a living motorcycle used by Kamen Rider BLACK. It was created by Gorgom, made specifically for the upcoming Creation Kings Black Sun and Shadow Moon. The Battle Hopper has the ability to heal its own wounds if damaged, and can stand on its own if knocked over. His special move is the Dynamic Smash, a body slam attack that is executed at full speed. Before the finale, Battle Hopper is connected to the King Stones and was later controlled by Shadow Moon due to this connection and dies in the final episode. Because of his strong connection to Kotaro's King Stone, he would later resurrect as Acrobatter in response to the Sun King Stone's evolution.

Speed : 1000km/hour

Acrobatter
The Acrobatter is the revived version of the Battle Hopper. It is now capable of speaking coherent Japanese, and often has conversations with Kotaro. Whenever BLACK RX transforms into any of his two other forms, it does the same.

Roborizer
Acrobatter transforms into Roborizer when RX becomes Robo Rider. This form of Acrobatter has two blasters mounted at its rear.

Mach Jabber
Acrobatter transforms into Mach Jabber when RX becomes Bio Rider.

SD
The SD Kamen Rider Black RX rides in a modified version of his Acrobatter motorcycle in the OVA, Kamen Rider SD: Strange!? Kumo Otoko.

Kamen Rider: The Bike Race
Black RX appears riding the Acro Batter (Kamen Rider Black is absent) in Kamen Rider: The Bike Race, a racing game featuring the majority of Kamen Riders and Rider Machines up to Kamen Rider Agito.