I found a MK64 soundfont

Whistler_420  •  Duration: 01:13  •  Size: 1.12 MB

MK64 Theme

mk64laliga  •  Duration: 00:58  •  Size: 911.09 kB

Gunslinger

mk64  •  Duration: 04:17  •  Size: 3.93 MB

MK64 Rainbow Road (Cover)

diego64  •  Duration: 04:32  •  Size: 4.15 MB

Koopa Troopa Beach MK64

Bastián Zurita  •  Duration: 02:02  •  Size: 1.86 MB

Mk64

BENSON  •  Duration: 02:10  •  Size: 1.99 MB

Luigi Raceway - MK64 (Korg M1 Version)

Megga  •  Duration: 02:42  •  Size: 2.49 MB

Rainbow Road MK64

ian la tuna  •  Duration: 04:09  •  Size: 3.8 MB

MK64 - Rainbow Road III

Rinileki14  •  Duration: 03:29  •  Size: 3.19 MB

MK64 Frappe Snowland

Duke1010  •  Duration: 02:16  •  Size: 2.09 MB

Luigi Raceway - MK64 (Sound Canvas VA Test)

Megga  •  Duration: 02:42  •  Size: 2.49 MB

MC Kids - Level 2 - MK64 Custom Music

PablosCorner  •  Duration: 01:51  •  Size: 1.71 MB

PalacesFall-3-13-13

mk64  •  Duration: 02:55  •  Size: 2.68 MB