Yes there was a G3 (and G1 I believe) Moondancer and here she is at her campsite waiting for her friends to arrive for their sleepover. Card info:
My Chubbier Pony Moondancer
LIGHT/Chubbier Pony/4/ATK 300/DEF 2500
This card cannot be Special Summoned except when you control “Super Weight Gain Formula”. If “Super Weight Gain Formula” is destroyed, destroy this card. This card cannot be destroyed by battle(with damage calculation). If this card battles, your opponent’s monster loses ATK equal to the difference between this card’s ATK and the attacking monster’s ATK.
Random
Ultra Rare/Ultimate Rare