The Santaclautch no Tamagotch (ンタクロっち), but much more commonly refered to as the Santagotchi or the Santaclautchi, was a Santa Claus and Christmas-themed Tamagotchi that was only released in Japan during Christmas in 1997. The character, rather than evolving, used different items to transform into different characters. The goal of the caretaker is to prepare Santaclautchi to go to each Tamagotchi's house, assisted by the caretaker, and give them a present. If Santaclautchi does not deliver the presents in time, the Tamagotchi in the house gets mad, Santaclautchi gets upset, and the caretaker has to start over. Santaclautchi were available in three colors: green, red, and white, with Christmas inspired graphics. They are very rare nowadays, and are quite expensive to purchase.
In some Tamagotchi versions, like the Version 4 and 4.5, Santaclautchi comes down to the screen and gives a present at 10:00 PM on Christmas Eve. He also appears in the Tamagotchi Plus Color on Christmas Eve at 12:00 AM.