What is the prevailing theory on why Lion-O grew during his stay in the suspension capsule? The original show pitch indicates that "LION-L" was expected to grow during the trip, while the same pitch described "WILY-KT" (the character concept that would become WilyKat and WilyKit) no differently than the adults. The dialogue in the pilot episode "Exodus" keeps with the idea that suspension merely slows aging; plus, once the ThunderCats emerge from it there's no mention of there having been any sort of malfunction that allowed Lion-O to grow faster than WilyKat and WilyKit. So, does that mean the latter two characters were naturally tiny? They don't have the proportions associated with dwarfism, and Lion-O was only a few inches taller than them when he started out. On the other hand, they were present on the ship's bridge when Lion-O was asleep, perhaps implying that they are indeed adults -- though their attitude throughout the show suggests otherwise.