Devil Pixies

 The Devil's Dungeon where you can take your pick of 5555 different demons with unique skills. Collecting and upgrading these demons will allow you to travel through the dungeon and defeat the demon bosses. In order to achieve this you must strategically place them on the battlefield and make them perform specific attacks. Each demon has a specific skill set and there are more than 5555 possible combinations. 
You play as the titular devil Pixies, who in a quest to stop the evil wizard Ghost from stealing the souls of all mankind to create new gods, has stolen their soul and is now possessed. In order to recover his lost soul, he must cross the world of humans and demons, defeat many enemies and avoid traps in the journey to retrieve his soul (and the curse that it entails).