Here is the full list of all 46 Touring Karts achievements.
Mix shield cola + Mini-bomb
Mix turbo cola + shield cola
Mix hammer + Shield cola
Mix Hammer + Enlargement cola
Mix bazooka + banana
Mix shield cola + Enlargement cola
Mix Bazooka + Enlargement cola
Mix hammer + Ice cube
Mix hammer + Mini bomb
Mix Bazooka + Ice cube
Mix Chicken + Bazooka
Mix Ice cube + Mini-bomb
Mix Banana + Shield cola
Mix banana + Ice cube
Mix hammer + Turbo cola
Mix chicken + Enlargement cola
Mix chicken + Shield cola
Mix Ice cube + Shield cola
Mix Mini-bomb with Turbo cola
Mix ice cube + Turbo cola
Mix Ice cube + Enlargement cola
Mix a banana + Enlargement cola
Mix chicken + Turbo cola
Mix chicken + Banana
Mix chicken + Hammer
Mix Bazooka + Shield cola
Mix Chicken + Mini-bomb
Mix banana + hammer
Mix Mini-bomb + Enlargement cola
Basic powerup
Basic powerup.
Mix Bazooka + Turbo cola
Mix Hammer + Bazooka
Mix Banana + Mini-bomb
Mix Chicken + Ice cube
Mix banana + Turbo cola
Mix Bazooka + Mini-bomb
Mix turbo cola + Enlargement cola
Unlock all the achievements