Disgaea: Netherworld Unbound

Disgaea: Netherworld Unbound is a game for Android devices. The game uses the sprites from Disgaea: Hour of Darkness. It is a Japan-only game that was planned to be released in other regions, but those releases were canceled.

Gameplay
In Disgaea For Android, you play as a Prinny who journeys into the Item World. You play through the Item World's randomly generated floors, fighting enemies and bosses. You can use the character creator to add characters to your army (made up of classes from Disgaea: Hour of Darkness). The game included micro-transactions to unlock the ability to create new characters.

Netherworld Catalog
Netherworld Catalog is a micro-transaction store that lets you spend money to add items to your game, which includes unique characters like Laharl and Adell.