Thunderlane is a male Pegasus pony who first appears in the episode Hurricane Fluttershy. He has a dark gray coat, amber eyes and a blue-silver mane. His cutie mark is a storm cloud with a lightning bolt descending from it.
Thunderlane first appears in the film-reel scene in Hurricane Fluttershy: he coughs, and Rainbow Dash warns him that he better not be sick for the upcoming tornado that the Pegasi have to create. Twilight Sparkle blames him for coughing during the talk Rainbow Dash gives to the group of Pegasus ponies before they begin measuring their wingpower. She sprays him with disinfectant, and he protests that it was Blossomforth who coughed. Rainbow Dash claims that he is just trying to get out of the event because he is lazy, and orders him to be the first test flier. Thunderlane is annoyed at being first up and glares at Blossomforth. After positioning himself at the starting line, he blazes down the track with a look of determination and is recorded with 9.3 wingpower, receiving cheers from crowd and an adoring look from Cloudchaser. On the day of the tornado itself, Thunderlane is missing, and Rumble, his brother, tells Dash that Thunderlane is at the Ponyville hospital due to him having a flu.