Purchase Asagi's house in the Facilities Manager and play Nethersea Volcano (10 Hours Left), Sandwich Palace (9 Hours Left), and Demonland (8 Hours Left). Then, go to the Balcony. Instead of Flonne being in the trap, ot will be Prinny Asagi. After defeating Prinny Asagi, you can go to the Facilities Manager and pay sweets to make her useable in the game.
Unlock the following levels by collecting the corresponding numbers of Lucky Dolls and then talking to the Lucky Doll NPC:
LEVEL - LUCKY DOLLS Baal Tower - 70 Lucky Dolls. This level is accessed by the Dimension Guide. Etna Boss Battle - 100 Lucky Dolls. This level is accessible from Etna's chamber Overlord Priere Stage - 36 Lucky Dolls. This level is accessed by the Dimension Guide.
Note: This requires the Premium Ticket downloadable content. Highlight the "New Game" option and press Triangle, Square, Circle, Triangle, Square, Circle, X to activate the Premium Ticket content. The game will start with Prinny Asagi in her story line, then Asagi will say, "Summer Greetings, dood!" to confirm correct code entry.
Purchase Laharl's House in the Facilities Manager and play Demonland (10 Hours Left), Nethervalley (9 Hours Left), and Unlucky Swamp (8 Hours Left). Then, go to the Balcony. Instead of Flonne in the trap, it will be Prinny Laharl. After defeating Prinny Laharl, you can go to the Facilities Manager and pay sweets to make him useable in the game.