* SugarWiki/AwesomeMusic: [[AwesomeMusic/SonicGenerationsFriendshipIsTimeless See here.]]
* CrossoverShip: Played with; there isn't really any shipping between characters of the two different universes, but Shining Armor and Cadance THINK there's something going on between Sonic and Twilight. The few times they bring it up to them, though, they're completely confused.
* HarsherInHindsight: If the story had been written after the events of ''WesternAnimation/EquestriaGirls'', Eggman ''definitely'' would have added Celestia's failure with her [[APupilOfMineUntilHeTurnedToEvil former apprentice]] Sunset Shimmer to his [[TheReasonYouSuckSpeech reason you suck speech]], because in canon, it was revealed that she considered that one of her [[MyGreatestFailure greatest failures.]]
* HilariousInHindsight: The whole concept of the Mane 6 getting [[SuperMode Super Forms]], after the [[Recap/MyLittlePonyFriendshipIsMagicS4E25TwilightsKingdomPart1 Season 4]] [[Recap/MyLittlePonyFriendshipIsMagicS4E26TwilightsKingdomPart2 finale]].
* TearJerker: Shining Armor's apology to Twilight over what happened in "A Canterlot Wedding". [[spoiler: The Time Eater has him and Cadance in its grip after dealing a serious blow to the mane six and Sonic. Shadow's words from earlier echo in his mind as he fears this may be the last thing he ever says to her.]]