Kirby - Squeak Squad

Unlock mini-game (Boss Endurance) and Cake in Collections menu:
Finish the game at least once.

Unlock Time Attack mode:
Collect all 120 chests and finish the game - in adventure mode.

Unlock Tower in the center of the world map:
Collect all of the secret map pieces from each worlds.

Birthday message:
Modify the system date to the date entered for your birthday in the
system settings to view Happy Birtday grettings.

In-game reset:
While playing the game, hold L + R + Select + Start to jump back to the
starting menu. You can start new a file without turning off the system.

Unlock Fire Sword: You must mix fire and sword.
Unlock Triple Star: Beat the boss in area 8.
Unlock Triple Star: Beat the boss on area 8.

Power Picker:
If you have two bubbles, such as sleep and beam, and you want somthing
else, like cutter, you can drag the sleep bubble onto the beam bubble back
and forth. If you do that enough, you will start seeing mini colored bubbles around the two big ones.
The first color is red, and you would get fire, bomb, or sleep.
The second color is blue, and you would get sleep or ice.
The third will be green, and you would get sleep, beam, or spark.
The fourth will be white, and you will get cutter, swored, or sleep.
The fifth color would be yellow, and you would get ninga, animal, or bubble.
The sixth color would be rainbow, and you woulds get rare things, such as
ghost, metal, bubble, and hammer.,