Bedmate Reveal: Blueblood waking up next to Rarity demonstrates that the time loop is finally over.
Be Yourself: In order to finally escape the time loop, Prince Blueblood must arrange for everyone to enjoy themselves at the Gala without violating their central character traits or causing a disaster.
Despair Event Horizon: As with the movie, after Blueblood discovers he can't kill himself to get out of the loop, no matter how thorough. Unlike the movie, he has a second, Played for Drama one later on when he makes the Gala perfect for everypony…except himself, meaning the loop repeats. He seriously considers making a Deal with Discord after that.
Driven to Suicide: Blueblood. Killing himself only makes the loop start over quicker, though.
Played with a little bit: Between loops, everything is the same to the smallest detail, except for how Pinkie Pie's reaction to any given event, which is different between each loop. Blueblood is very surprised at this; Pinkie is not.
Laughing Mad: Manifests itself when Blueblood is driven to suicide. Also a comedic example when Blueblood wakes up in one loop after learning about all the different kinds of apple deserts from Applejack. This leads to him smashing his alarm clock and making his way down stairs, cackling maniacally as he goes to the kitchens to apparently learn how to prepare them.
Mundane Utility: Blueblood learns how to teleport. He uses it for things like catching a falling vase.
Pity the Kidnapper: The guard Blueblood assigns to monitor a seemingly random area soon stumbles upon Trixie being harassed by some Diamond Dogs…or was it some Diamond Dogs being harassed by Trixie?
Powered by a Forsaken Child: During one of the loops when Blueblood goes crazy and burns down Canterlot, he uses a spell to create fire that burns for eleven days and eleven nights, can't be extinguished by water nor wind nor mortal magic...and all it required as a reagent was the body and soul of a single pony.
What You Are in the Dark: After his failed attempt to get everyone to enjoy the Gala, Blueblood is driven to seeing Discord and freeing him to find a way to break free. In the end, he decides not and plods back for another attempt.
Who Wants to Live Forever?: Theoretically, should Blueblood desire to do so, he could stay, eternally youthful, within the Groundhog Day Loop forever. He instead tries his hardest to get out. After hundreds of repeats, he eventually does.