Jimmy is nice and easygoing, and if it weren't for the leash (which could be passed off as a fashion statement), seems like he has the least wrong with him. This couldn't be further from the truth. Jimmy is deathly afraid of being left alone, and hates most uncertainty. Ralph and Fred aren't sure, but every now and again, it seems like he acts differently, almost depressed, when he thinks he's alone. Fun loving, and kind, Jimmy is definitely the most understanding of the group.