Ant Troopers are enemies that appear in Super Mario 3D World. They are not hurt by jumps, so Mario and co. merely bounce off when they jump on Ant Troopers. Ant Troopers merely walk in a line with other Ant Troopers, ignoring Mario and co. whenever they get close. Ant Troopers can also walk on walls and ceilings. In the same game, there are Big Ant Troopers as well. Later, in Mario & Luigi: Paper Jam, they appear in groups of 10 but can be beaten through any attack (unless they have a spike helmet on them).
Ant Troops are round, dark purple ants. Their head is larger than their torso. They have glowing, pupils, yellow eyes, mouths, and stubby antennae on their heads, while they have red feet and two thick, slightly darker stripes on their bodies. These enemies are a bit taller than Mario.