"I'll show them. I'll stay up all night and protect you. Nothing and nopony will stop me from keeping you safe."

Pinkie proceeded to diligently guard the cake all night, not allowing anypony near it. Later the next day, it took second place in the Canterlot dessert competition, with the distinction of being Princess Celestia's first choice for 'tastiest treat'.

S02E25 A Canterlot Wedding - Part 1

"I've got something to say! She's evil!" Twilight pointed an accusatory hoof at Cadance.

Everypony froze.

"Are you sure?" Celestia asked. "I trust you, of course, but this is quite the accusation."

Twilight nodded. "I'm sure."

"But... but... I'm not... I can't be evil!" Cadance broke down into tears. "What's happening? Why is she doing this to me?"

"Don't worry." Celestia gave a calm smile. "I have a simple spell that should clear up any misunderstandings. It reveals lies and deceptions."

Cadance's eyes went open wide. She grimaced.

"All you need to do is pass this little test, and then we can all find out what the misunderstanding was." Celestia's horn glowed.

"Wait! I'm–"

A beam of golden magic hit Cadance, ripping away her disguise and leaving a black changeling queen in her place.

Everypony stared at her.

"Aha!" Twilight shouted.

S02E26 A Canterlot Wedding - Part 2

"Right you are, Twilight." The changeling cackled. "And as queen of the changelings, it is up to me to find food for my subjects. Equestria has more love than any place I've ever encountered. My fellow changelings will be able to devour so much of it that we will gain more power than we have ever dreamed of!"

"No. You won't." Princess Celestia stalked toward her. "Now that I have revealed your true self, I can protect my subjects from you!" She took to the air and fired an intense beam of golden energy toward Queen Chrysalis.

The Queen shot back her own green beam, smashing it into Celestia's and even beginning to push it back.

Celestia winced. "Twilight! I little assistance, please?"

"Of course!" A violet beam shot out from Twilight's horn toward the changeling.

It, too was blocked and countered by a green beam, but with her magic split in two directions now, Chrysalis was losing ground on both fronts. "No! Fools! My army will–"

The violet and gold beams met in the middle, blasting the changeling away, straight through one of the stained glass windows of the hall.

Twilight stood there a moment, panting. "Whew... I wasn't expecting her to be that strong."

"Indeed." Celestia took a deep breath and twisted her neck back and forth, making a slight cracking sound. "Now, how about we go find the real Princess Cadance and get this wedding back on track?"

Twilight smiled. "You can count on us!"

Author's Notes:

Be sure to fave or follow if you're interested in seeing the sequel: season 3.