True Scoundrels - The Butt Jiggle Gang Fairy Tail : Season 3 Episode 30

When Natsu and company escort a shipment of gold, the train is hijacked by the wickedly flatulent trio known as the Jiggle Butt Gang. After Natsu and Lucy get blown away by the bunch, it's up to Wendy to save the shipment, a tough task when Wendy's a hostage herself.