Sir Frosty is an enemy from Spirit Tracks.
Sir Frosties are found in the Snow Realm as overworld enemies that attempt to destroy Link's train. Sir Frosties attack by de-capitating themselves and throwing their heads at the train. The head can be shot with the Cannon to be avoided. Their heads re-generate if the body is not destroyed and they then continue the assault. If Sir Frosties have their head on, they take two hits to defeat, but only one without it.
- Sir Frosty's name possibly comes from the popular song and TV program, Frosty the Snowman.