Shormy

An all-rounder specialising in Speed, they can be evolved from Shadow Spirits into four types. An Average Level Type that learns LifeTap, a Strength Level Type that learns ShadowAttack, or one of two Dexterity Level Types that learn either ShadowStep or MistForm. They can then further evolve into Hole Worms, Void Bringers, or Shadow Djinn. Note that only Shormy can evolve into Dex Type Void Bringers.

With flying and ShadowTrail, the Shormy is the fastest way to create shadow tiles for a shadow party, quickly making a path for the other units.