While its predecessor and sequel (Battle Spirit 2) were both ported to the Game Boy Advance for international audiences, Ver. 1.5 remained a in Japan. This has made it a sought-after collectible for fans of the handheld and the Digimon Tamers era. It also features cross-play capabilities with the original version, allowing owners of both editions to compete.
This mode would allow you to pick two Digimon and swap them mid-battle, adding layers to the existing "ball-collecting" gameplay: digimon tamers battle spirit ver. 1.5