This is how birth of Mimikitty goes in Copycat (CTaRaoMToLaCN).
[Ryan and Iago finds Twilight]
Ryan F-Freeman: Hey, Twilight. Thomas was worried about you. What's the matter?
Twilight Sparkle: Théo has been akumatized,
Iago: Don't worry, Twilight. If Cat Noir is innocent then you like Ryan as a Prime. Meg can be a Prime as well.
Twilight Sparkle: I should be a Prime, Iago! Optimus chose me! I'll show Ryan who the real Prime is!
[Twilight runs off]
[Meanwhile, in Hawk Moth's lair]
Ryan Repulsa: Hawk Moth. I think I smell a pony with a disire to become a Prime.
Hawk Moth: Guess you can do it, partner. And you got her for your Akuma.
[Ryan Repulsa fills the Akuma with dark energy]
Ryan Repulsa: Fly away, my cool akuma. And corrupt her like a friend of Connor Lacey.
[The Akuma flies out of the window]
Iago: Twilight. Wait.
[Twilight stops and saw the Akuma flying]
Twilight Sparkle: Whoa. A butterfly.
[The Akuma lands on a photo of Thomas and Connor Lacey and a butterfly frame forms around her eyes]
Ryan Repulsa: Mimikitty. I am Ryan Repulsa. I apologise for the hero Ryan being a Prime but, I think a girlfriend for Copycat can do. I need your help. I think you want to love Ladyan. For it, I give you Copycat's powers and look like Kitty Noir. In return, you need to bring me and my partner the Matrix and the Miraculous. Can you do it?
Twilight Sparkle: Yes, Ryan Repulsa. Soon, Ryan will pay and his roomate Ladyan will love me.
[
Mimikitty: Meow. I am a hero.
Iago: Twilight? You ok?
Mimikitty: I am Mimikitty, the Princess of mimicry.