Here's my reedition of what the (Phase 2) final boss music might sound like for a possible remastered Mario & Luigi Partners in Time, anyway hope you enjoy.

Art Credit: https://www.deviantart.com/magicofgames/art/PIT-Elder-Princess-Shroob-in-DT-Style-725181307

Another's Requiem REMIX

Luigi's Mansion - Mario Kart DS

Deep Castle

Vs. Nightmare X WIP

A MIDI remix of Master Porky's Theme. Made from a now defunct site 
SolMiRe.com

Master Porky’s Theme - MIDI Remix

A really bad GarageBand (IOS) cover of Gourmet Race from the Kirby franchise

Kirb's Gourmet Race

SPOOKTOBER Special-
The song that plays on the Luigi's Mansion track from Mario Kart DS, Mario Kart 7, and Mario Kart Tour

Jax

Popular tracks