Interestingly, this is the first occasion when Rainbow is shown as creating a rainboom in a climb. She performs the maneuver in Part 2 right as the couple kisses at the end of the ceremony as instructed, and seems to do so very quickly and effortlessly as she bolts her dress off. Rainbow Dash is instructed by Princess Celestia to perform a sonic rainboom for the wedding of Shining Armor and Princess Cadance later in Part 1, she mentions having been busy preparing for it. The sonic rainboom is featured again in the season two finale, A Canterlot Wedding. Rainbow Dash performing another sonic rainboom in the sky over Canterlot. This contradicts her flashback in the episode where she witnesses one, however she only realizes what it actually is at the end of the episode. Pinkie Pie mentions in Sonic Rainboom that she has never seen a sonic rainboom before in her life. Pinkie Pie draws inspiration from the sonic rainboom's rainbow wake and holds her very first party, which earns her her cutie mark. After a few accidents and Princess Celestia's intervention, Twilight discovers her cutie mark. Twilight Sparkle is personally affected by the sonic rainboom it takes place during her entrance exam for Celestia's School for Gifted Unicorns, and sends her into a powerful magical state which allows her to hatch Spike. She affirms her love for fashion and gems and gets her cutie mark. Rarity witnesses a giant rock getting cracked open by the sonic rainboom, and discovers it contains gems.

Fluttershy calms animals that have been frightened by the sonic rainboom, and discovers her affinity to animals. Applejack, who was visiting relatives in Manehattan, sees its rainbow wake which seemed to point back to Ponyville, and discovers she wants to work on her family's farm. The very same sonic rainboom that earned Dash her cutie mark was involved in the other leading characters earning theirs. Pinkie Pie as a filly, witnessing the sonic rainboom that would change her life. I made the impossible happen!' - Rainbow Dash about her flashbackīoth this sonic rainboom and the one in Sonic Rainboom are performed when Rainbow Dash is leading with both front legs forward, while in her failed practice attempts she is leading with a single leg. ' Most people thought that the Sonic Rainboom was just an old mare's tail. She earns her cutie mark almost immediately afterwards. Rainbow Dash, in a flashback, races against two other Pegasus ponies, and unwittingly performs a sonic rainboom while she speeds along the race's obstacle course. The second time sonic rainbooms are mentioned is in The Cutie Mark Chronicles. Rainbow Dash as a filly, performing her first sonic rainboom.

This event is later mentioned by Spitfire in the episode The Best Night Ever. The move dazzles the stadium's audience and boosts the Pegasus's speed, allowing her to catch the group in distress before impact. Later in the episode, however, Dash pulls it off in the process of her frantic effort to save Rarity and three Wonderbolts who are plummeting down to Earth.

Her ability to perform the maneuver is questionable through the first half of the episode with her dedicated practice making seemingly no progress towards being able to complete it. Sonic rainbooms are first mentioned in the titular episode, where Dash practices her routine for the Best Young Flyer competition.

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