Caterpie debuted in Working My Way Back to Mew!. Goh found it munching on a leaf, and, wanting to make it his first capture of the day, snuck up on it and threw a Poké Ball. This capture inspired Goh to obtain one Pokémon of every Bug-typespecies native to the Kantoregion, which he achieved by the end of the day. Afterwards, it was seen with all of his other Pokémon before Professor Cerise suggested leaving it at his Laboratory.
In Panic in the Park!, Caterpie was one of the Pokémon that suffered from a lack of food at the Cerise Laboratory. It, along with Weedle, were threatened by Grimer after it accused them of eating more than their share. In the end, after the conflict grew worse, Caterpie joined the Laboratory's other Pokémon to help Goh's three Cascoonevolve safely into Dustox.
Caterpie was shown to enjoy staying active, participating in Mimey's kung fu exercises. It also expressed concern after Metapod was kicked by Scorbunny. It is shown to spend most of its time around other Bug-types since arriving at the park and is often seen next to Weedle. It does not enjoy battling, staying away from any form of conflict and growing upset if confronted.
Its String Shot is shown to be very durable and is often used as a means to help Goh navigate difficult terrain.
