Actually he floated to the island with Yukon Cornelius and Hermie when the Abominalbe Snowman chased them onto an ice pack. Yukon Cornelius broke the ice pack free with his pick just as the Snowman stepped into the water. Of course the Abominalble's can't float so he couldn't chase them.
I don't remember for sure . . . "Happy Birthday!" is what he says when they put the hat on him and he comes to life. I don't remember for sure what he said at the end.