Tamagotchi no Puchi Puchi Omisecchi: Mina San Kyu
This game is titled Tamagotchi Connection: Corner Shop 3 in North America and Europe, and Tamagotchi no Puchi Puchi Omisecchi: Mina San Kyu in Japan.
Select the "Special" option at the main menu. Select the "Enter Code", then enter one of the following codes to activate the corresponding cheat function.
Double layered cake
Enter R6194BJD6F as a code.