Stick Ranger: Cavern Chronicles/Mud Grotto 1/Purple Gel Copter

About
A surprisingly annoying enemy for an enemy in the first stage. This enemy drops an orb to the ground when it floats near a character. Because it flies, it can be hard for melee characters to hit it, especially since copters like to float at decently high height without going down. However, it will have a lot of trouble harming you if you are able to find someplace higher than the copter, because it will hesitate going up. Ranged characters are quite effective on it, so use those.