Smudge is the friendly, gentle, and sweet tomkit neighbor of Rusty when he was a kittypet. He is well-meaning, but can be gullible and cautious believing all the stories that the other cats say about the wildcats in the forest apparently. He was also Rusty's old bestfriend in the neighborhood before Rusty left. He always said his opinion about stuff like the wildcats before Rusty left, though Rusty sometimes didn't listen at all.