Final Squeegee was the ultimate form of Squeegee (obviously). He is not an official Squeegee form as he can only be formed if Squeegee, Super Squeegee, and Dark Squeegee, who are the same being, seperate into three individual beings, and then fuse. His resemblance to Squeegee is well, he is Squeegee. His resemblance to Super Squeegee is the shape and the hat. His resemblance to Dark Squeegee is the color scheme. Unlike Super and Dark Squeegee, Final Squeegee will not revert to Squeegee if damaged badly. One, because he is invincible, and two, if somehow he would get damaged enough, he would revert back into Squidward, not Squeegee. His powers included enhanced versions of Squeegee's (a.k.a Super Squeegee powers) and dark powers (Dark Squeegee's powers).
NOTE: When Squeegee, Super Squeegee, and Dark Squeegee are about to merge, their appearences slightly change. This is so they can become Final Squeegee. If they didn't do this, they would become whole regular Squeegee.
Now regular Sqeegee has a new form. Fire Squeegee.