Here is the full list of all 44 Bakugan: Defenders of the Core achievements worth 1,000 gamerscore.
Purchased all upgrades for all Bakugan.
Got S rank in every Story Mode battle.
Purchased all upgrades for six different Bakugan.
Unlocked every Bakugan in the game.
Got every Ability card in the game.
Defeated Spectra and stopped his evil plans.
Won 30 times against the CPU in Battle Arena Mode.
Did all combos on a Bakugan's Combo List in a single battle.
Did ten perfect combo breakers in a single battle.
Did ten combo breakers in a single battle.
Obtained 500 or more points in a Battle Arena Destruction Battle.
Opened each type of Gate card at least once.
Obtained 250 or more points in a Battle Arena Free For All.
Won five duels against the CPU in Battle Arena Mode.
Deflected an opponent's physical attack 5 times in a single battle.
Did twenty or more hits in a single combo.
Rescued your friend at any cost.
Collected every metal figure in the game.
Got A rank or higher in twelve Story Mode battles.
Found a way into Vexos Headquarters.
Defeated Mylene and Shadow at the same time.
Defeated Volt and Lync at the same time.
Earned 100,000 in core energy.
Picked up all three power-up types in a single battle.
Defeated Spectra's right-hand man.
Defeated your ultimate foe and paid the ultimate price.
Built a hologram tower of each attribute.
Got to Abyss before the Vexos.
Defeated Lync and stopped the earthquakes.
Stopped the kidnappers and got Wilda back.
Didn't get fooled by Mylene's tricks.
Got B rank or higher in six Story Mode battles.
Saved Ingram and Nemus from Lync.
Saved Percival from Volt.
Joined forces with Ace.
Got ten items from item boxes.
Invented hologram towers and used them to beat the Vexos.
Built a hologram tower.
Saved Elfin from Shadow.
Threw your Bakugan to get an item.
Saved Dan and Marucho.
Destroyed a Vexos crystal in Story Mode.
Purchased an upgrade for a Bakugan.
Followed Dan's instructions.