Double-click flag so that the music syncs! You can replace Boyfriend by going into his costumes and replacing the poses with your character's poses. You can also change some of the animation code if you want it to look different.
I was debating between this or a remade "I sing Phantasm". I picked this, so pit yourself against Challeng-Edd me and Remastered BBpanzu me in Final Destination. Items are optional, and you're not restricted to Fox. Update: Fixed my Challeng-Edd form; he no longer stays still during the duet parts.
