Ecko is the expert in stealth tactics of Base 22. She's based on Abby Lincoln from Codename: Kids Next Door. Her older sister, Proditor the Grovyle, was originally a member of the Poke-Spies, but she betrayed her team and befriended the humans.
Ecko is so attached to the rules of being a Poke-Spy, she wouldn't trust a single human good or evil. Her signature move is Energy Ball.