I am yet to see the Yeti Zombie in Plants vs Zombies (PC/iPhone ) and also I've been betting 50hrs+.
Exists a details problem that requires to be loaded for him to show, a means to cause his arrival or is it entirely arbitrary?
You require to have actually finished the journey setting as soon as. And afterwards in degree 4 - 10 it will certainly show up. If you eliminate it, after that it will arbitrarily show up throughout the video game. (source)