Alec
Defeat Salome and Alec in Chapter 8-6.

Asagi
Reach level 1,000 and get 100,000 mana. Select the "Challenge the next protagonist" option in Zeta's wish system, then defeat Asagi. dfpa vmfeyte sh, sa.

Babylon
Reach level 200 and get 9,000 mana. Select the "Fight against Babylon" option in Zeta's wish system, then defeat Babylon.

Castille
Reach level 100 and get 5,000 mana. Select the "Fight with hero" option in Zeta's wish system, then defeat Castille.

Cider
Reach level 160 and get 7,000 mana. Select the "Fight against Cider" option in Zeta's wish system during Chapters 3 through 8 then defeat Cider.

Dark King
Reach level 120 and get 5,500 mana. Select the "Defeat Dark King" option in Zeta's wish system during Chapter 6 in your third cleared game and defeat Dark King.

Etna
Reach level 80 and get 4,000 mana. Select the "See the ending" option in Zeta's wish system, then defeat Flonne, Etna, and Laharl.

Flonne
Reach level 70 and get 3,000 mana. Select the "Fight ally of justice" option in Zeta's wish system, then defeat Flonne, Etna, Laharl.

Pram
Kill over 60 allies before Chapter 9 and defeat Pram.

Prinny
Reach level 10 and get 1,000 mana. Select the "Make a Prinny" option in Zeta's wish system, then kill a Prinny in a normal battle.

Robosuit
Reach level 200 and get 30,000 mana. Select the "Want strongest robot" option in Zeta's wish system, then defeat Robosuit.

Salome
Reach level 180 and get 8,000 mana. Select the "Fight with Salome" option in Zeta's wish system during Chapter 5, then defeat Salome.

Valvolga
Reach level 250 and get 10,000 mana. Select the "Fight against Valvolga" option in Zeta's wish system during Chapter 1 through 8, then defeat Valvolga.

Zeta
Reach level 300 and get 15,000 mana. Select the "Fight with the strongest demon in space" option in Zeta's wish system, then defeat Zeta.

Battleship Yoshitsuna battle
Reach level 300 and get 20,000 mana. Select the "Fight strongest person in game" option in Zeta's wish system.

Bonus monster classes
Reach the indicated levels unlock new monster classes.

Death: Mana Sphere, Forsaken One and Dark Stalker to level 30.
Devil 1: Vampire and Death to level 50.
Devil 2: Gobbler and Guardian to level 50.
Gobbler: Carrot Dude, Pump Kin, Apple Kid and Corn Guy to level 10.
Guardian: Gardener and Iron Golem to level 20.
Heaven's Bliss: Mimic and Idol to level 20.
Thunder God: Heaven's Bliss to level 50
Vampire: Hell Kitty and Bombster to level 20.

Bonus character classes
Reach the indicated levels unlock new classes.

Archer: Witch, Cleric, and Merchant to above level 20.
Berserker: M. Sword Master and Cook to level 50, Mechanic to level 20.
Cook: Thief, M. Magician, Medic to above level 20.
Female Infantry: Start Chapter 3.
Female Swordsman: F. Warrior and F. Infantry to level 10.
Male Infantry: Start Chapter 3.
Male Swordsman: M. Warrior and M. Infantry to level 10.
Mechanic: Start of Chapter 4.
Medic: Start Chapter 3.
Officer: F. Sword Master and Archer to level 50, Professor to level 20.
Professor: Start Chapter 4.

Ending sequences
Complete the indicated tasks to see the corresponding ending sequence.

Etna's takeover: Lose to Etna in her event dungeon. After losing you will see a sequence featuring Zetta and Etna.

Laharl's attack: Lose to Laharl in his event Dungeon. After losing you will see a sequence featuring Zetta, Laharl, Etna and Flonne.

Alexander's bad ending: Complete Chapter 8-6, have Salome die, then defeat Alex.

Alexander's bad ending 2: Complete Chapter 8-6, have Salome die, then have Alex win.

Good ending: Complete Chapter 8-6 with Salome alive and complete the last stage with 49 or less ally kills.

Pram's bad ending: Complete Chapter 8-6 with Salome alive and complete the last stage with 50 or more ally kills then defeat Pram.

Pram's bad ending 2: Complete Chapter 8-6 with Salome alive and complete the last stage with 50 or more ally kills then have Pram win.

Salome's bad ending: Wish to fight Salome in Chapter 5 and defeat her.

Zetta's bad ending: Wish "I want to beat the strongest", then have Zetta win. For an alternate version, have Laharl in the lead.

Easy Mana
Getting Mana this way involves healing and may cost some HL. First, select the character you want to earn Mana for and make them the leader. Then, summon all of your characters and any weapon (preferably a sword). Have the leader throttle all of the summoned characters until they are completely obliterated. Check your status to see how far up your Mana has increased. Repeat this as many times as desired. Note: Do not bother thrashing lower level characters; the higher the level, the more Mana you get for killing them. Note: This may trigger bad endings.

Shortcut in event dungeons
When you start in event dungeons such as Flonne and Etna ,you can usually see a Prinny with a key to open a path to the Boss. This takes time and allows the enemy to get close to you. There is a way around this. Have a character pick up Zatta, and move as far as possible. Then, throw Zetta. Its all right of he does not land on the platform and falls into the empty space. The game will automatically place him on the ground. You can now start attacking on the first turn.