Watch Buddy Thunderstruck Online for free at CouchTuner. Buddy Thunderstruck is an action-comedy, stop-motion extravaganza that follows the adventures of a semi-truck racing dog named Buddy and his albino ferret mechanic. It all goes down in race-obsessed Greasepit, a place chock full of larger-than-life characters and nitro-burning, gear-slamming, tyre-squealing, fish-tailing good times.