Unlock the following characters and arenas by performing the corresponding tasks:

CHARACTER/ARENA - HOW TO UNLOCK
Aquos (Arena) - Defeat all the brawlers in the Aquos (Arena) in the tournament
Darkus (Arena) - Beat the game once
Haos (Arena) - Beat the game once
Pyrus (Arena) - Defeat all the brawlers in the Pyrus (Arena) in the tournament
Subterra (Arena) - Defeat all the brawlers in the Subterra (Arena) in the tournament
Ventice (Arena) - Defeat all the brawlers in the Ventice (Arena) in the tournament
Billy - Defeat Billy in the Subterra (Arena) in the tournament
Dan Cusso - Defeat Dan in the Pyrus (Arena) in the tournament
Julie - Defeat Julie in the Subterra (Arena) in the tournament
Marduk - Beat the game once
Marucho Marukuro - Defeat Marucho in the Aquos (Arena) in the tournament
Masquerade - Defeat Masquerade after you have won with Shun in the Ventice (Arena) in the tournament
Runo Misaki - Defeat Runo in the Aquos (Arena) in the tournament
Shun Kazami - Defeat Shun in the Ventice (Arena) in the tournament

Unlock the following Evolved Bakugan by performing the corresponding tasks after completing the game:

EVOLVED BAKUGAN - HOW TO UNLOCK
Battle Axe Vladitor - Defeat Marduk without giving up and cards
Blade Tigrerra - Defeat Runo in a battle royal
Delta Dragonoid II - Defeat Dan in a battle royal
Dual Hydranoid - Defeat Masquerade in a battle royal
Hammer Gorem - Defeat Julie in a battle royal
Omega Leonidus - Get before doing the last battle in story mode
Preyas II - Defeat Marucho in a battle royal
Storm Skyress - Defeat Shun in a battle royal

Unlock the following Protagonist Bakugan by performing the corresponding tasks in the park:

PROTAGONIST BAKUGAN - HOW TO UNLOCK
Cycloid - Join Julie In a Tag Team Battle
Dragonoid - Defeat Dan in a One on One Battle
Fortress - Join Dan In a Tag Team Battle
Gorem - Defeat Julie in a One on One Battle
Harpus - Join Shun In a Tag Team Battle
Preyas - Defeat Marucho in a One on One Battle
Sirenoid - Join Marucho In a Tag Team Battle
Skyress - Defeat Shun in a One on One Battle
Tentacler - Join Runo In a Tag Team Battle
Tigrerra - Defeat Runo in One on One Battle

Enter the following codes at the name entry screen to activate the corresponding cheats:

CHEAT CODE - CHEAT FUNCTION
423482942968 - 10,000 BP
180978772269 - 1000 BP
332044292925 - 5000 BP
449824934071 - Unlocks Bronze Warius