pipo monkey
Monkeys in the Ape Escape series. They are under control of Specter.
They have a big mouth and eyes with solid circle pupils, wear shorts of different colors (mostly yellow), and a mind control helmet called the Pipo Helmet. The Pipo Helmet alerts of the monkeys behavior with a siren light on top of it; where Blue means the monkey is relaxed, Yellow meaning it's alert, and Red meaning it's aggressive.