The Gislie are a species of bat that inhabit the mountain that Brim was hiding in.
They are giant bats, and are purple in colour. Their big ears are able to pick up on energy from the Pure Stones. It is unknown if they attack with their sharp teeth or the spike on their foreheads.
As they are guardians, they are very unfriendly to those who try to enter their mountain, often picking them up with their claws and carrying them away, or breathing green fire on them.
- They appears as enemies in the Mountain region of the DS game. They use Yin, Yan, and Infinis attacks.