Literally just the different instruments in each song, but they cut out and come back in like a song, instead of in response to player input, like in the game

Link to vini64 https://www.youtube.com/channel/UCGuiKL6tFPxKtPI0zdGvXog

Super Mario Maker 2 Editor OST - SMW Desert (Mix by vini64)

Kirby Mass Attack

Service Song (Game Over)

This is the soundtrack for Shovel Knight Dig that released on Sept. 23rd, 2022. 
I heavily recommend checking out Jake Kaufman (virt) and his other works (https://virt.bandcamp.com/).
I also recommend you play the game on IOS, Android, Nintendo Switch, or on Steam (https://www.yachtclubgames.com/games/shovel-knight-dig).

Overground (Campfire Layer)

PLA OST - 14 - Caught a Pokémon!

Mother 3 - 171 Right Left Light Reft

Mother 3 - 118 Love Theme (Reprise)

Music from Crash Bandicoot N. Sane Trilogy

Hog Ride

Panic Puppet Act 2

Dark Bowser! DX - Mario And Luigi Bowsers Inside Story + Bowser Jr.s Journey OST

Paper Mario: The Origami King Original Soundtrack (GAMERIP)

Luigi's First Appearance // Paper Mario: The Origami King (2020)

Shy Guy Ballet - Defeat // Paper Mario: The Origami King (2020)

Service Song (Game Over)

Kirby Mass Attack OST