User blog comment:JKGame/Starlight & Trixie vs Penn & Teller: Epic Rap Battles of The Universe/@comment-34129479-20180904044421

I'm gonna give this one to Starlight & Trixie; their chemistry was pretty fun.

As for any solo battles for the two; the only other opponent I can think of for Trixie (aside from other real life magicians) is Draco Malfoy from Harry Potter. And maybe Starlight vs Vegeta or some other reformed villain.

also Fluttershy vs Sucy Manbavaran (Little Witch Academia)