Pinkie Pie is meant to have the Poison Joke and therefore cannot speak properly but ah well. See this artwork on its card from my latest MLP Yu-Gi-Oh card set, which is being uploaded to deviantART. Card info:
Water Spray
Normal Spell
Select 1 "My Little Pony Energetic Pinkie Pie" you control that is being affected by a face up "Poison Joke". When it attacks, put 1 Water Counter on all monsters your opponent controls. Monsters with a "Water Counter" lose 1000 ATK for each Water Counter on them.
Secret Rare