Oh dear, was it really needed for you to make it a .wav file? I guess it's cool for making it compatible for RPG Maker 2000 and '03, but seriously, that file's going to cost a lot of space. XD Why not export it as an .mp3?
This song is actually not from Castlevania. This is from Dance Dance Revolution: Max 2. It's by Mr.T (A Japanese artist for Beatmania).
Also...I like the wahwah effect, but I wish you did more than just warp the song. Making the melody vary in pitch too is a bit of a turn off. I don't know if you have any elaborate music maker, but if you do, then you should definitely tinker much more with that!