Kevin is the fourth character you will encounter.Ironically he is a vegetarian. He sells hot dogs at Rob's place behind his house after completing a mission.

After you open Downtown, he moves there and will run the Burger universe after you repaired it. Throughout the game, he will provide advice and missions.

Missions: First, collect the four pieces of Kevin's hot dog cart. This requires killing the Supersize Zombies. Other missions Kevin gives you:

Deep Fried Salvation

Cooking Lessons

Mixed Greens

In the dutch translation this character also goes by the name of Kevin