In addition, it is playable with the DX Boonboomger Robo (sold separately) as it includes the Boonboom Trailer. You can push said Boonboom Cars to the Boonboom Trailer in Gate Mode to transform them into their respective Attack Modes. In this mode, you can equip them to give the Boonboomger Robo new weapons! But that's not all, once the Boonboom Trailer, Boonboom Classic, and Boonboom Racing combine, they'll form the Boonboomger Robo Knight! This set cost 3,080 yen, and is set for an April 20th release.
But that's not all, if you don't have the budget to buy the set, you can purchase the DX Boonboom Classic and DX Boonboom Racing each on their own for 1,540 yen. The DX Boonboom Classic is set for a March 2nd release, while the DX Boonboom Racing is set for an April 20th release.