She's built for speed and loves a challenge! In Explorer Koko, everyone's best friend Koko is chosen to carry the King of Buffertonia and his dignitaries on a special tour of Chuggington. Koko also ...

Koko decides to try for the High Speed badge - something no trainee has ever won. Emery wishes he still earned badges like the trainees do. For fun, he plays a 'pretend badge' game with Hoot and Toot, ...