Credits
Unlock the Power Star Statue. Enter the shop, select it from the souvenir stand, then say "Surprise" into the microphone.
Duty Free Shop unlockables
Trade milage points to buy things from the Shop:
Effect - Code
Tour Sounds - Pay 1000 mileage points
Character Voices - Pay 1000 mileage points
Cruise Mileage Secret 1 - Pay 500 mileage points
Cruise Mileage Secret 2 - Pay 500 mileage points
Aquarium Secret - Pay 500 mileage points
Orb Shop Secret - Pay 500 mileage points
Team Secret - Pay 500 mileage points
Birdo (playable character) - Pay 1000 mileage points
Dry Bones (playable character) - Pay 1000 mileage points
Brutal difficulty - Pay 1000 mileage points
King of the River (minigame mode) - Pay 2000 mileage points
Stunning Background - Pay 2000 mileage points
Staff Records - Pay 3000 mileage points
Ice Moves (Rare Minigame) - Pay 3000 mileage points
Stick and Spin (Rare Minigame) - Pay 3000 mileage points
Annoy Mode (All Taunts) - Pay 500 mileage points
Map Sounds (Solo Cruise Only) - Pay 1000 mileage points
Souvenir Secret - Pay 500 mileage points
Extra Coins
Some orbs have coins in them. You just have to get lucky to get them!
Mad Props: Easy win
Select Practice and do this three or four times. Hold L and R and release the button in the direction of the turn. For example, on a left turn release L.
Secret souvenirs
These souvenirs are not available for purchase in the Duty-Free shop and must be gotten through other means:
Effect - Code
Chop Chop Helicopter - Play the deluxe cruise many times and purchase in the Duty-Free Shop for 1000 Cruise Mileage Points.
Miracle Treasure Chest - Complete the Easy course in King of the River mode.
Free Play Sub - Play every type of game in the Minigame Cruise and purchase in the Duty-Free shop for 1000 Cruise Mileage Points.
Magic Lamp - Complete the Normal course in King of the River mode.
Power Star Statue - Complete the Hard course in King of the River mode.
MSS Sea Star souvenir - Play every board in Party Mode once, then buy for 1000 Cruise Mileage.
Staff Credits
In order to see the Staff Credits, you must first obtain the Power Star Statue from the Hard course of King of the River. Go to the Duty-free shop and select it on the souvenir stand, say "surprise" into the microphone and the staff credits will begin rolling.