Spine Buster was destroyed in the Metro Realm during The Speed of Silence. In the mini-episode Cliffside Realm 2.1, which takes place immediately after Speed of Silence, we see Wylde working on its replacement, Flathead Fury. In this scene, the captured RD-S1 jumps in another half-built car (that looks a lot like Flathead Fury too) and takes off for the portal. Wylde chases him, running past Rivited, Hollowback, Spine Buster and Rollin' Thunder before jumping onto the frame of the speeding car.

Wait a second... Wasn't Spine Buster destroyed in the Metro Realm? I know cars keep reappearing after being destroyed - so why's Wylde working on a new car (or two)?

Also, Monkey and Tork are driving their cars (Hollowback and Rollin' Thunder) in the Cliffside Realm. Are these more replacements?

I'll let you decide....

Thanks to Hollowback Boy for pointing this out!

Wylde running past Spine Buster

Cliffside Realm 2.1 AcceleRacers Video Info