Circle Throw inflicts damage and has decreased priority. In a Trainer battle, it will switch out the target to the next Pokémon in line that has not fainted (if there is one). In a wild Pokémon battle with a single wild Pokémon, this move will cause the battle to end if the user's level is equal or greater than the target's; however, if there are multiple wild Pokémon in the battle, it works the same as in a Trainer battle.
If using this move causes the user to faint (such as if the target is holding a Rocky Helmet or has the Ability Rough Skin or Iron Barbs), the target will not be forced to switch.
Circle Throw will fail to end wild Pokémon battles or switch out the opposing Trainer's Pokémon if the target has the Ability Suction Cups, is under the effects of Ingrain, or has Substitute set up.
In the anime, Circle Throw is depicted as a judo technique called "Tomoe-nage", in which the attacker grabs the opponent by their head and falls back, using the combined forces of their legs and inertia to throw the opponent over their head.
This move has also similarities with a wrestling maneuver called "Monkey Flip".
Circle Throw's effect of forcing the target to switch has never been featured in the anime.