Credits for if you didn't read them on the forum page:

FFoxD/delf: Spin Steer

CobaltBW/clairebun: Charge Aura and Gather Thinkers

Crumble FOF Lua: Frostiikin
DrStephen: Originally made Trick Fail Sprites for XMomentum

Kart Krew(?): "I pity you" and Voice Lines

BlueTorch: Custom Dashmode

SilvaGunner: Totino's Drowning Music

Chrispy: Little snippet of menu background code from ChrispyChars

CloneFighter: Originally made the textbox library

CosmicPikachu (That's me!): The idea of the mod and most of the code