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Napoleon Dynamite reference
In Axel mode, Axel will learn a move called Love Dynamite, and the description reads 'I voted for Pedro'. Pedro was Napoleon's friend who was running for class president.
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Axel (Akutare) mode
At the main menu, highlight the 'New Game' option, then push Triangle, Square, O, Triangle, Square, O, X to unlock Axel (Akutare) mode. In the Japanese version, highlight the 'New Game' option at the main menu, then push Triangle, Square, X, Triangle, Square, X, O.
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Bonus characters
Successfully complete the indicated task to unlock the corresponding character:
| Prism Red | Pass the five Prism Rangers bills when Adell is a Sentator, then pass his bill a second time. |
| Asagi | Unlock Asagi's map with 33 felonies, 100 mana, then defeat her, and pass her bill as a senator in a New Game+. |
| Marjoly | Unlock Extra Stage 7 with 99 felones and 1,500 mana. Overcome Marjoly, then pass her bill. |
| Vyers (Mid-Boss) | Unlock Extra Stage 5 with 20 hours of game play time and 400 mana. Successfully complete Vyers' stage in Episode 1-9. Reach the stage again during the next playthrough, and pass his bill. |
| Laharl | Unlock Flonne, then pass Flonne's bill as a senator, and successfully complete Extra Stage 9. |
| Gordon | Unlock Extra Stage 4, and pass Gordon's bill after completing it. |
| Preire | Unlock Extra Stage 6 with 66 felonies and 100 mana. Then, defeat Priere during Episode 1-9, and pass her bill. |
| Raspberyl | Unlock Raspberyl's stage after completing thirty Dark Sun stages and unlocking Mr. Champloo. |
| Sabre Kitties | Successfully complete Axel mode 1-2. |
| Mao | Unlock Mao's stage after unlocking Champloo, Raspberyl, and the Land Of Carnage. |
| Mr. Champloo | Unlock Mr. Champloo's stage with 50 hours or more of game play time and completing Axel mode. |
| Flonne | Unlock Extra Stage 8 with 40 hours or more of game play time. Then during Episodes 12-13, defeat Flonne. |
| Asagi (humanoid) | Raise Asagi's level to 2,000, and pass her bill as a senator. |
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| Zetta | Unlock Extra Stage 11 with ten Dark Sun stages completed and 3,000 mana. Successfully complete the map, then pass Zetta's bill. |
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The Lord Of The Rings reference
The Elven Bow's description states that it was used by an elf in a quest to destroy a ring. The elf mentioned was Legolas, and the ring mentioned was the One Ring.
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Alternate endings
Successfully complete the indicated task to unlock the corresponding ending sequence:
| Etna | Overcome Etna in Chapter 3. |
| Tink | Overcome the Final Boss with level 1,000 Tink. |
| Axel (Akutare) | Get defeated by Axel (Akutare). |
| Laharl | Overcome Laharl in Chapter 11. |
| Middle Boss | Overcome the Mid-Boss before Chapter 4. |
| Bad | Have Adell get 10+ felonies and kill an ally 50+ times. |
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| Worst | Have Adell get 99+ felonies, kill an ally 99+ times, and Rozalin (Rossary) ally-killed by Adell. |
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Bonus classes
Successfully complete the indicated task to unlock the corresponding class:
| Magic Knight | Reach level 3 Sword and Staff Mastery with any character. |
| Archer | Reach level 5 Bow Mastery with any character. |
| Female Ninja | Reach level 5 Fist and Staff Mastery with any character. |
| Samurai | Reach level 5 Sword Mastery with any character. |
| Gunner | Reach level 5 Gun Mastery with any character. |
| Chaos Soldier | Successfully complete the game. |
| Druid | Execute a 500+ Geo combo. |
| Heavy Knight | Reach level 3 Spear Mastery with any character. |
| Male Ninja | Reach level 5 Fist and Sword Mastery with any character. |
| Mass Produced Kurtis | Successfully complete Extra Stage 4. |
| Disgaea Ronin | Have a saved game file from Disgaea |
| Female Samurai | Have a saved game file from Disgaea |
| Entei Monster Class | Successfully complete Axel mode 2-3. |
| Beast Tamer | Capture a monster. |
| Celestial Host | Successfully complete Axel mode 3-3. |
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| Sinner | Become a criminal with any character. |
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Land Of Carnage
Acquire all 16 Treasure Maps from the pirates in Item World to unlock Land Of Carnage, which is a world that features all normal levels with very strong enemies.
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Infinite Magichange turns
Throw a character back in the base panel to get unlimited turns for Magichange.
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Magichange
Successfully complete Axel mode, then begin a new game session in Adell mode to unlock Magichange.