The enemy is found roaming inside the North Caves and Guera Caverns. Along with the Goblin, it is one of the weakest enemies in the early stages of the game. The player can easily defeat Blood Bats with a single physical attack.
During Part II, Blood Bats can only be found inside the Trial Tower bonus dungeon. When they are encountered in the Trial Tower, the Blood Bats receive higher stats and use Bloodfeast more often. When fighting Blood Bats, it is highly advised of the player to have high level armor and to attack with Bladeblitz and high level spells.