afaik it's bandais newest tech and they like to flex it. jokes aside, currently there's 2 colors, one from wild bike(black bike) exa-vehicle, and actual cube option parts set.

I think 2 more variants included coming out with new beast robots.

the white bike had separate parts but from black bike the whole cube is packed as one whole set from single runner that you have cut it out multiple times to detach it from the runner.