“Perhaps, my master, we can go to a more private place, so you don’t accidentally blow up the entire town” and with that Rainbow Dash snapped her fingers and made herself and Trixie appear on a secluded beach in the Pacific.  
Trixie felt the sand beneath her coils and tried to move. It was definitely useless, she didn’t have any control of her ventral muscles. She concentrated on her staff, rolled it again, thinking on her body, her beautiful, perfect, human body… and with a loud poof, she regained her human form. Being her narcissist self, the new body of Trixie was more Great and Powerful, reaching the heights and measures of a top model. She ended up with the finest, softest bikini, made of silk, interwoven with gold. She made poses and enjoyed herself.  
Rainbow Dash looked at her master doing all of her antics. “So… Trixie, for your second wish… would you like to be a genie like me?”  
“Hahaha, nice try Rainbow! The GREEEEAT and POWERFUL and SEXY Trixie will not fall for your riddles! I saw the movie!” and with that she winked at Rainbow, in a friendly way.  
“Well, it was worth a try, hehehe, having phenomenal cosmic powers feels kinda nice… and lonely after 100 years of quantum-relativistic time of genie-training” said Rainbow as she played with what was (hopefully) a model of Jupiter.