Mr. Bat is the first in the Bat series of items in Riviera: The Promised Land. It is obtained only in Lacrima Castle with a quantity of five (x5). Serene is the best user of this item; it will never backfire on her, hits an extra time, and heals all allies.
Catching Mr. Bat causes the player to miss out on a permanent stat boost for Ein that he can get by killing it instead. (The wings can be given to NaNa in the Magic Guild).