Tunnel Rhino is a minor antagonist from Megaman X3. He is a Reploid who served as a minor in the Energen Crystal mines until he joined Dr. Doppler in his utopia but would later be infected by the Maverick virus. He'd then be ordered to guard the caves from intruders.

While based on a rhino, his armored body is bulky and humanoid. The color of it is different shades of yellow, orange and brown and some sections of it like the shoulder pads have drills on them, even his nose has a drill horn. His plated head is the only part colored green. His right arm utilizes a drill as well, only his left arm having a usable hand.

Like his namesake, his preferred method of attack is ramming into his opponent which he can accelerate his charge using the treads of his feet. He can also eject the drills on his body as projectiles using Tornado Fang. Thanks to Doppler's influence he can use a desperation move when he becomes momentarily invincible when he charges.