fast

Play as Sergei Square, L1, Square, L2, Triangle, R2, X, Circle

Play as Jackal L2, L2, Circle, R2, Square, R1, L1, Triangle

Ryan's Storm Sled Circle, Triangle, Square, R2, R2, L1, X, Triangle

Sergei's Storm Sled Circle, Triangle, Square, X, R2, L1, X, Triangle

Jackal's Storm Sled Circle, Triangle, Square, L2, R2, L1, X, Triangle

Jay's Storm Sled Circle, Triangle, Square, Circle, R2, L1, X, Triangle

Gio's Storm Sled Circle, Triangle, Square, L1, R2, L1, X, Triangle

Nadia's Storm Sled Circle, Triangle, Square, Square, R2, L1, X, Triangle

Tracey's Storm Sled Circle, Triangle, Square, Triangle, R2, L1, X, Triangle

Travis' Storm Sled Circle, Triangle, Square, R1, R2, L1, X, Triangle

Demo track R2, L1, Triangle, Square, Triangle, R1, Circle, X

Unlock Super Snocross tracks Square, X, Triangle, Triangle, L1, R2, Circle, Triangle

Unlock Open Mountain tracks Square, X, R2, Square, Circle, R1, Circle, Triangle

Cheaper upgrades X, L1, Circle, Triangle, Square, Square, Triangle, L2

Fog mode Square, L1, X, Square, R2, X, Triangle, Circle

Mirror Mode Circle, L1, R2, R2, R1, X, Triangle, L2

Reversed tracks Square, L1, X, Square, R2, X, Triangle, Circle

Dance mix R2, Triangle, X, R2, Triangle, Square, Circle, X

(I don't know what the last 2 do...)

Ebay

If by SNES Mini you mean the SNS-101, then yes. Same as the original SNES.