The six ponies, along with Saten, Derpy, and Glaze race towards Canterlot Tower where the elements are held. The changelings finally shatter the protective sphere and start wreaking havoc in the city. The group are hemmed in by a crowd of hungry, vicious changelings, which take on the appearance of the the group to confuse them. Using everything from their hooves to Pinkie Pie's party cannon, the ponies defeat the first wave of changelings. Saten smashes a bottle onto one.
However, their reprieve is short; Canterlot Tower has already been overrun by more changelings. With the numbers stacked heavily against the Mane Six, they are eventually captured.
The changelings have imprisoned Celestia in a lime green goo cocoon in the wedding hall and glued Cadance's hooves to the floor with the same substance. Cadance insists that the six friends will save them, but a group of Changelings walk in with the friends held in custody. Chrysalis gloats that everyone but Twilight was too fixated on the wedding to notice anything. Applejack apologizes on behalf of the others for ignoring Twilight's doubts, and Twilight assures Applejack that she has no hard feelings. Chrysalis sings a stanza to the tune of This Day Aria as she observes the chaos in the streets below.
Twilight frees Cadance and urges her to try and break the spell on Shining Armor. Cadance embraces him and breaks his trance with her spell of love. Shining Armor says that he doesn't have the strength to repel the changelings, but Cadance declares that her love will give him strength. The two connect horns, creating a powerful, bright pink, purple and white whirlwind of magic that lifts the couple into the air and shakes the room. When they look into each other's eyes, their bodies glow with bright white light and take on a heart shape as the magic expands outward as a bright, purple sphere. The ponies shade their eyes from the light, while Chrysalis and the changelings are thrown out of Canterlot. With the changelings gone, and Celestia free from her cocoon, the ponies prepare for the real royal wedding.
At the wedding, Twilight takes her reinstated place as best mare as their parents look on proudly from the audience. Celestia pronounces Cadance and Shining Armor mare and colt and levitates their rings onto their horns. Celestia commends the heroism of Twilight and her friends and emphasizes the importance of trusting one's instincts. The bride and groom step out to a balcony to wave to a crowd of cheering ponies. As Shining Armor and Cadance kiss, Celestia reminds Rainbow Dash to perform her sonic rainboom for the ceremony.
The scene changes to the evening wedding reception in the courtyard, where the newlyweds start dancing. Princess Luna joins her sister and the Mane Six and unknowingly asks if she missed anything. DJ Pon-3 works her turntables and Twilight sings Love Is In Bloom while a montage of humorous and memorable photos taken during the party is shown. At the end of the party, Shining Armor thanks Twilight and they hug.
Celestia approaches Saten. Asking why she never gets friendship lesson letters from him.
Saten: I'm not part of the main six.
Celestia: Oh, it's not limited to them, and your a big enough character.. Give me what you learned sweetie.
End of episode: