From the Super Mario Wiki
Eggplant Warriors are enemies that appear in the Game Boy Advance game Wario Land 4. They appear to be eggplant-like monsters, much like Spoiled Rotten but smaller versions. They are purple, have green feet, and wear headbands with knives attached to them. The only time they appear in the game is when they assist Spoiled Rotten when battling the game's protagonist, Wario. The behavior of the Eggplant Warriors are essentially the same as that of the Totsumen (catching sight of him, then charging after a few seconds), found in other Passages.