Win the Ultimate Battle Tournament and Defeat Marduk in the final battle. After that, go to the park and challenge any of the following characters to unlock their guardian Bakugan at the Bakugan Store. Defeat any of them a second time to unlock the evolved form of their Guardian Bakugan. NOTE: you must first purchase the Guardian Bakugan before you can unlock its evolved form.
|Choji||Aquos Preyas; Aquos Preyas II Angelo/Diablo|
|Dan||Pyrus Dragonoid; Pyrus Delta Dragonoid II|
|Julie||Subterra Gorem; Subterra Hammer Gorem|
|Marduk||Darkus Vladitor; Darkus Battle Ax Vladitor|
|Masquerade||Darkus Hydranoid; Darkus Blade Hydranoid|
|Runo||Haos Tigrerra; Haos Blade Tigrerra|
|Shun||Ventus Skyress; Ventus Storm Skyress|