Nezu (ネズ) is an enemy that appears in Tails Adventures. Their name is derived from the Japanese word "nezumi" (鼠), which means "mouse".
Nezus are small, oval-shaped robots designed to resemble rats in appearance, complete with round ears and short legs. These robots are usually stationed in caves, particularly Volcanic Tunnel, Cavern Island and Polly Mt. 2, where they will remain still in one spot. If Tails stands nearby one, it will start waddling towards him and place a tiny bomb next to him before returning to its previous position. It cannot attack him if he is flying above it however, and will just remain still.
While usually a minimal threat to Tails, they can be placed in rather tricky sections or inside small passages that only the Remote Robot can access. Nevertheless, a Nezu can very easily be destroyed with any offensive item, such as throwing Bombs from a safe distance or by dropping a Bomb while flying overhead. Like many enemies in Tails Adventures, Nezus have a chance of dropping a Ring when destroyed.