From the Super Mario Wiki
Retrieved from "https://www.mariowiki.com/index.php?title=Chomp_Keeper&oldid=2392289"
The Chomp Keeper is a bright red female Pianta from Pianta Village who owns many Chain Chomplets and a giant Chain Chomp. She is quite temperamental and doesn't seem to take very good care of her Chomps, but nonetheless she still cares about them and knows what they need when they're ill, as shown when she informed Mario about how to get rid of her Chomp's fever.
Three Chain Chomplets appear in the first episode of Pianta Village, Chain Chomplets Unchained. They run amok across the village and leave Lava Goop everywhere because of their high fever; luckily, Mario is able to cool them off by launching them in the rejuvenating lake. After they are healed, they take on a silver color and give Mario a Shine Sprite.
A giant Chain Chomp with a large scar on its head appears in the fourth episode, Chain Chomp's Bath. It is boiling with rage because it does not wish to take a bath. Thankfully, Mario is able to get it to the hot spring and give it a bath. After it is calmed down, it becomes golden and gives Mario a Shine Sprite for his troubles.