The Yumemi Demo theme from Phantasmagoria of Dim. Dream. Also sometimes translated as "Love of Magical Chimes".
Very upbeat and loud, but also short and tense, it could probably work best for cutscenes, bonus areas, or possibly even a P-switch. Basically anywhere you wouldn't be hearing it for 10 minutes straight.
This was actually the first song I ever ported, but I've touched it up quite a bit since its first incarnation. Special thanks to Giftshaven for a lot of the advice he gave me!