The wolf is huge with a scraggly build, mangy fur, huge eyes, a vastly exaggerated maw and fangs, large paws complete with enormous claws, and a triangular build with a larger upper body than lower, his body becoming much more slender towards his waist and hindquarters.
The wolf is an ominous creature, dangerous and deadly enough that everyone seems to fear him, except, of course, Peter. His first instinct upon seeing Peter is, of course, to attack relentlessly, and he refuses to give up his prey even when it's high in a tree out of his reach.
In Peter and the Wolf, the evil wolf relentlessly pursues Peter and his animal friends in an attempt to eat them. Sonia the duck eventually ends up being separated from the rest of the group, and the wolf leads her on a long chase and seemingly devours her. Determined for revenge, Peter organizes a plan to capture the wolf with Sasha the bird distracting him, while Peter and Ivan the cat tie him up with a rope that the young wolf hunter had. At the end of the segment, the wolf can be seen in the parade hanging upside down with his feet tied to a stake that the hunters carry.
In Lambert the Sheepish Lion, the wolf tries to eat Mrs. Sheep, Lambert's adoptive mother. When he hears Lambert roaring at him for attempting to eat the lion's mother, he drops his vicious streak and becomes incredibly cowardly (to the point of running for cover) and emits Goofy's trademark yell when he is pushed off a cliff by Lambert. The narrator also shows sympathy for the wolf when he points out that the wolf clung onto a berry branch during his fall and that he wouldn't starve, making the wolf seem more pitiful than threatening.