Unlike the present, it's now deserted. However, the remaining Chu Chus has finally fled from the Kapu Kapu 2nd Invasion (which is larger). Now it's infested with Kapu Kapu, along with other space aliens.
Here are the monsters:
Kapu Kapu
Dark Kapu
Shrooblet
Shroob
Elite Shroob
Shroob Rex
Tashrooba
Snoozorb
Dark Tamagotchi