Tunnel Rhino, known as Screw Masaider (スクリュー・マサイダー Screw Masaider?) in Japan, is a Rhinoceros-based Maverick from Mega Man X3. Formerly he worked as a miner in an energen crystal mine, but upon going to Doppler Town by invitation he became a Maverick. Now under Doppler's orders, he occupies a rock quarry and uses his Tornado Fang (his drilling weapon) for destructive purposes. Acid Burst is his main weakness, but it takes practice to wield properly and Rhino is invincible while he flashes. Zero, in Mega Man Xtreme 2, can take him with Earth Gaizer.