This Tamagotchi is so small, it does not have icons, so the caring is done with A button. If the owner suspects the character needs something, they press the C button. If the character does a specific animation, or a certain menu appears, the owner can care for it accordingly. This is used to feed, clean poo, turn on or off lights when it's sleeping, or cure sickness.
The B button switches between the clock and main screen, and C cancels out of any open menu (as in Food selection or lights). Due to the screen size, the Tamagotchi Mini does not have a "Date" function.
The first stage of the Tamagotchi's life lasts approximately 24 hours before becoming an adult. It will become a special adult within 7 days, and pass away approximately 7 days later.
After the initial debut in Japan, special designs of the Chibi Tamagotchi were released to tie in with a new series of Tamagotchi-based clothing. A special Tokyo design was also released.
In late 2007, a special New Years edition, known as the Kaien version, was released. It includes new foods and two new secret characters. Mametchi evolves into a character named Miko-san, while the other adults become Darumatchi.