Is there monster raising? on X: "You can create & command Zombies in Undead Knights, originally released for the PSP! In this Musou game you can turn your enemies into Zombie helpers.
Undead Knights - Gameplay PSP HD 720P (PPSSPP) - YouTube
Undead Knights – Sony PSP – SeattleGameGurus.com
Undead Knights Review for PlayStation Portable (PSP) - Cheat Code Central