Scrat is a saber-toothed squirrel who loves acorns. He is commonly shown in scenes as a comic relief character, involving Manny, Sid and the rest, but never interacts with them, directly with a few exceptions. He appears in all four films, as well as his own short films, "Gone Nutty" and "No Time For Nuts" and has also made a cameo appearance in Sid's short, "Surviving Sid." He usually has his own stories in the film, independent of the main plot, which are parallel with the journeys of the other main characters simply by chance, making the other characters meet him occasionally. Although not fully part of the gang, Scrat has proven major success around the world and has become a breakthrough character of the series.