The second Jim made his dramatic entrance in the same series as his predecessor, by trampling through Nova's crops. This Jim was also more intelligent and aggressive than the first, by evading capture as well as attacking Danz, Danz' door and Nova.
After the unexplained death of Jim I, Jim II was placed in a much stronger containment area in hopes that the sunlight wouldn't kill him.
Despite the increase in containment, Jim II disappeared, and had a grave made for him by Nova.