While flying on the back of the ThunderClaw with Bengali, Wilykit uses a slingshot for the first time.
Tug-Mug comes from the first moon of Plun-Darr.
Chilla comes from the second moon of Plun-Darr.
Red Eye comes from the third moon of Plun-Darr.
The Jungles of Darkness is influenced by the third moon of Plun-Darr. The ThunderCats developed infared night-vision goggles (called "Cats' Eyes") to allow them to see in this area.
The Caverns of Cold is influenced by the second moon of Plun-Darr. The ThunderCats developed thermal suits (called "Cat Suits") to keep them warm in this area.
The Mountains of the Moon is influenced by the first moon of Plun-Darr. The ThunderCats invented equipment (called "spring heels") so they could move around with ease under the higher gravity.
(After disabling the Feliner with the Ratstar)
Slithe: Nice work, Vultureman. Looks like the ThunderCats' expedition ended before it began. Mumm-Ra will be delighted with me.
Vultureman: Don't laugh too soon, Slithe. Those wretched ThunderCats have nine lives.
Lion-O: If Mumm-Ra gets his hands on the Treasure of Thundera, if he can seize the sword of Plun-Darr, none of us will survive. But here's the toughest part: Some of you will have to stay here. Lynx-O, you and Pumyra will man the Tower of Omens.
Lynx-O: As you say, Lion-O. You are the Lord of the ThunderCats.
Lion-O: Bengali, you will take care of Cats' Lair.
Bengali: I'd rather be fighting Mumm-Ra. But I understand, Lion-O.
Lion-O: Wilykit, Wilykat...
Wilykat: I don't think we're gonna like this.
Lion-O: You will be staying on Third Earth.
Wilykit & Wilykat: Oh, Lion-O!
Lion-O: More than that, you'll be working separately. Kit here at the Lair. Kat, with Lynx-O and Pumyra at the Tower of Omens.
Wilykat: But, Lion-O, we always work together!
Wilykit: We've never been apart.
Lion-O: We've never faced a danger like this before either. If we're going to pull through, you have to play your part. You are ThunderCats, we need you more than ever.
Wilykit: We understand, Lion-O.
Panthro: Night-vision systems, anti-gravity units, thermal suits? Seems to me that if we're going to survive on that new Thundera, we've got our work cut out, Tygra.
Tygra: I'll start putting some ideas together, right away.
Lynx-O: We'll have to devise a way of keeping warm in those Caverns of Cold. Some kind of thermal suits.
Snarfer: Thermal Thunder-wear!
Snarf: This is no time for childish jokes, Snarfer.
Snarfer: Sorry, Uncle.
This is the first time the twins have ever been forced to work apart from each other.