Kikkaijin Waniida is an alligator monster and an antagonist in episode 5 of Kamen Rider Stronger.
Waniida ran a Black Satan restaurant chain where the customers are fed Satan Bugs so they may possess their unwitting hosts. This plan eventually intersects with the path of Shigeru Jo after he attends one such restaurant where he is hypnotized by a Satan Bug who tries to force him to kill Yuriko Misaki. After Stronger broke out of his possession, Waniida was destroyed by his Stronger Electro Kick.
Powers and Abilities
Waniida can swing his giant metallic tail and use it to severe limbs. He can also chomp through walls with his iron jaw and swim thanks to being based on an alligator.