Sonic 4 (WiiWare) Midi + SF2 by Squeals92 at 7:15 AM EDT on October 11, 2019
Made this because I was informed the game uses sequenced music, and I couldn't find any sort of rip here.
The game uses 2 banks (and I don't know what sequences use which banks) so you'll have to toy with it yourself. VGMtrans_WTL was used to export the sequences/soundbanks.