Tentou is an insectoid Badnik robot created by Dr. Eggman. Based on a ladybird, the Tentou flutters just above the ground in Sonic CD's Collision Chaos stage. Occasionally they will plant bombs on the ground to impede Sonic.

Another version of Tentou appears in the Secret Base Zone in Sonic Advance. This version clings to the ceiling and shoots two projectiles from its shell when an intruder approaches.