Kirby Fighters Deluxe Cheats - 3DS

Unlock Kirby: Triple Deluxe StreetPass Bonuses
If StreetPass Data for Kirby - Triple Deluxe is found on your 3DS, you'll unlock 2 new abilities and 1 new stage.

Beetle Ability - Have StreetPass data for Kirby: Triple Deluxe on your 3DS.
Bell Ability - Have StreetPass data for Kirby: Triple Deluxe on your 3DS.
Waddle Dee Train Tracks - Have StreetPass data for Kirby: Triple Deluxe on your 3DS.

Unlock Rare/Alternate Costumes
Complete Single Player mode with an ability to unlock it's corresponding coustume:

Rare Archer Hat - Complete Single Player with the Archer ability.
Rare Beam Hat - Complete Single Player with the Beam ability.
Rare Beetle Hat - Complete Single Player with the Beetle ability.
Rare Bell - Complete Single Player with the Bell ability.
Rare Bomb Hat - Complete Single Player with the Bomb ability.
Rare Cutter Helmet - Complete Single Player with the Cutter ability.
Rare Fighter Headband - Complete Single Player with the Fighter ability.
Rare Hammer - Complete Single Player with the Hammer ability.
Rare Ninja Headdress - Complete Single Player with the Ninja ability.
Rare Parasol - Complete Single Player with the Parasol ability.
Rare Sword Helmet - Complete Single Player with the Sword ability.
Rare Whip - Complete Single Player with the Whip ability.

Shadow Kirby
Complete the Single Player campaign on Very Hard mode to unlock Shadow Kirby as a selectable color in Multiplayer and Training modes.

8-Bit Fountain of Dreams
If you get to the final boss in the Single Player campaign on Very Hard difficulty, you'll get an extended cutscene with King DeDeDe. You'll also fight on an alternate, more retro version of the Fountain of Dreams stage.