Where are the Ponds Twins in Amphibia?
So in Season 2 of Amphibia there is a episode titled Wax Museum where Anne and the Plantars meet the Curator aka Mr. Ponds. Mr. Ponds is an alternate universe version of Stan Pines, somethings Frog Soos hypothesizes about. In addition in another episode Marcy is seen flipping through a book that contains an image of Bill Cipher. But something that is notable is the absence of this world's Pines Twins.
So through Lost Legends and The Book of Bill we know a multiverse exists, but Bill tells us something interesting about it. Bill says the following about Dipper and Mabel. "They don't consider for a single moment the sheer improbability that they got to exist in the ONE timeline where they kept all their bodily organs, out of the INFINITE timelines where they were erase, shattered, drowned, frozen, or dismembered before they could make it to 13." So I question, if the Amphibia world a timeline where the Mystery Twins weren't so lucky? Written by Eris the Lorekeeper