At one point, Scrat was only intended to star in the first eight minutes of first film. However, with more scenes of him added, he became the icon star of the Ice Age. The famous prehistoric sabre-tooth squirrel stars for each trailer and teaser announcing future Ice Age films. Although he lacks the ability to speak while the other other animal characters can, he is given plenty of his own scenes. Always in pursuit of his acorn, Scrat is tireless, and resists all the misfortunes that fall on him to get his way!

Although his quest is completely parallel to the movies, it is often linked to the characters and the story. In the first film, the trio asked for directions, but Diego gets rid of him quickly, thinking the rodent would betray them. In the second film, Scrat would even save everyone by allowing the water to drain the bowl! Upon passing out, he is sent to heaven where the acorns he pursued throughout his life are finally available! But because an Ice Age movie isn’t really an "Ice Age" movie with Scrat, Sid brings him back to life to his greatest displeasure!

In the third film, Scrat finds a love interests. A females sabre-tooth squirrel named Scratte who is equally obsessed with nuts! What then followed is a tough love that Scrat finally gave up for his one and only love: His acorn.

In the fourth film, Scrat caused a continental drift and embarks on an adventure that, once again, exceed the tolerance. However, as stubborn and obsessive as he is, he will one day succeed to get the object of his lust, no matter what gets in his way.