The Yetis were all defeated when Sonic realised what the Tantaror was doing and ordered him to stop.
The Yeti is also known as the Abominable Snowman in many stories. In the Decap Attack series, the beast was captured by Colonel Boldwig-Smythe (and son, Giles) and was brought back to the United Kingdom. However, by the time they'd got home, the snowman had melted and all that was left was a jar full of slush.
- Sonic Lost World featured multiple yetis as minor enemies that looked nothing like this one and were comical in nature, as was the rest of the game. Small world, isn't it?