The Sidecar Glider is an aerial vehicle that appears in Kingdom Hearts II and Kingdom Hearts II Final Mix. Riku commandeers it in The World That Never Was for the second battle with Xemnas and his Dragon Form on the Altar of Naught. It is only seen during this fight.
After the Corridor of Darkness leading to Destiny Islands closes, Xemnas and the dragon appear to attack Sora and Riku. After the latter destroys the upper tower of the Castle That Never Was, Riku notices the Glider and runs towards it, asking Sora to get on its side platform. The two follow them, fighting the dragon until they face Xemnas in the ship's cockpit, and the Glider is sucked into a void.
The Glider's design is similar to that of sidecar motorcycles, where a small cab is attached to the relatively larger main vehicle in order to provide for a second passenger. It shares many similarities with Terra's and Ventus's Keyblade Gliders. Like Terra's glider, the main vehicle is sharply angled at its front tip, and the seats in both are slung forward so that the driver is nearly horizontal. The sidecar's design is similar to Ventus's Glider, in that the rider must stand as though riding a skateboard, allowing him to strike passing enemies.