Treasure Yeti Zombie question

Hello, 

I wanted to ask if the "Treasure Yeti Zombie" is still currently available for killing in-game on the "a:6.4.1I d:0.0.0" western version of PvZ2 on Android , since I have pretty much completed the story mode and got the Google Play Achievements except for the "Sasquashed!" one, which requires a Treasure Yeti to be killed ( Also the only zombie I still dont have in the Almanac is the Yeti.). I have looked over the internet for information about it , but there isnt a clear answer if the TY is still available or not. Also, I have never received the Treasure Yeti Notification. It was stated on a site that the Yeti was available every 18 hours, then after newer updates, about every couple of weeks , but Ive been playing since about 3 months, probably every day and I have never received a TY Notification nor seen the TY itself.