馬里奧賽車

得英文 version, 希望幫到你啦.

Bonus karts
Win a Gold trophy in all cups in the Nitro Grand Prix in the 100cc class to unlock a third kart for all characters. Win a Gold trophy in all cups in the Nitro Grand Prix in the 150cc class to unlock a total of seven karts for all characters. Win a Gold trophy in all cups in Nitro Mirror mode in the 150cc class to unlock all karts for all characters.

Play as Daisy
Win a Gold trophy in all cups in the Nitro Grand Prix in the 50cc class to unlock Daisy.

Play as Dry Bones
Win a Gold trophy in all cups in the Retro Grand Prix in the 50cc class to unlock Dry Bones.

Play as R.O.B.
Win a Gold trophy in all cups in Retro Mirror mode in the 150cc class to unlock R.O.B.

Play as Shy Guy
Play a Download Play game against another player to have the option to play as Shy Guy. Note: Shy Guy can only be used Download Play mode.

Play as Waluigi
Win a Gold trophy in all cups in the Retro Grand Prix in the 100cc class to unlock Waluigi.

有五個隱藏人物, 其實係四個 Daisy, Dry Bones, R.O.B., Waluigi; 因為 Shy Guy 要雙打先有.

參考以上既方法或到以下網址睇下啦.
http://www.cheatcc.com/ds/mariokartdscheatscodes.html

破其中的一關....forget

只要打破其中的一關(獲得好的成績)就行。^_^我獲得了dry　bones