After acquiring the appropriate mastery, petition the Dark Assembly with the correct bill to have them create the following extra classes:
Extra Stage 01 - Fight Asagi Having 33 felonies, 100 mana, with a couple or more play throughs of the game, the proposal; "I want to fight the hero from another game" will appear.
Extra Stage 02 - Prism Rangers Return: Only in episodes 12 and 13, with 200 mana, the proposal "Return of the Prism Rangers" will appear. Have that passed to fight the Prism Rangers.
Extra Stage 03 - Fight Kurtis: Must use up 3 Defenders of Earth Cell phones. After that, the proposal; "Rescue the Earth Hero!! (EDF) will appear.
Extra Stage 04 - Fight Kurtis Clones Clear extra stage 3, then use up another 3 Defender of Earth Cell Phones. This will make the proposal; "Rescue the Earth Hero Again!! (EDF) appear.
Extra Stage 05 - Fight Vyers Have 20 hours of game play, 400 mana, and in only episodes 1-9, the "I want to see the ending!" proposal appears. Game will end when you beat him.
Extra Stage 06 - Fight Preire: Having 66 felonies, 100 mana, a few play throughs in the game, and only appearing in episodes 1-9, the proposal; "Unleash The Fallen Maiden" will show.
Extra Stage 07 - Fight Marjoly: Having 99 felonies, 1500 mana, during anytime, the proposal “Break the mysterious seal” will appear.
Extra Stage 08 - Flonne: Play 40 hours and be on chapters 12-13 to unlock "I want to fight an Overlord!" proposal. Pass it to unlock Extra stage 8 "In Holt Village" Beat it and she'll join you.
Extra Stage 09 - Laharl: After getting Flonne, have Adell become a senator. Attend Dark Assembly and pass Flonne's "Summon Laharl!!" proposal. Beat Extra stage 9.
Extra Stage 10 - Fight Laharl Again With 5000 mana and in episode 1 only, have the proposal; “Pick a fight with an Overlord” passed and you will fight: Laharl with another boss.
Extra Stage 11 - Fight Lord Zetta: With 10 dark world maps cleared. 3000 mana and during anytime, the “Meet the strongest Overlord” proposal will appear.
Extra Stage 12 - Fight Baal: With 25 dark world maps cleared, with 9999 mana, and during anytime, the “Meet Tyrant Baal” proposal will appear.