Planet Hare Island is set three years after the original island.
The blimp lands on the island, and you see a big factory. The factory has an endless tube coming from the roof. You talk to a worker, and he says the tube is to send carrots to space for Dr. Hare.
After Dr. Hare was launched to space and was never seen again in the 1st island, he landed on an alien planet called Zooki and then things got worse since he ruled that planet. Save the Zogains from Dr. Hare before the planet becomes a slave planet.