Viva Piñata: Trouble in Paradise (2008) and Pocket Paradise (2008) have piñata yetis (piñeti?). Only they are called jelis and come in various colors.
The game was turned into a Canadian kids cartoon in 2006, and a jeli/yeti was shown in the episode "The Abominable Jeli" in 2007. I believe his appearance pre-dates his appearance in the video game.
Another fulfillment of wish # 9 from the 2014 Wish List (thanks, Kris Kringle)