>>58731577Nah, since gen 3 actually, that line appeared in Latias and Latios island first, which is why a Devon scientist talks about investigating pokemon dreams and then in gen 5 they expand upon it and Fennel has her research of the dream world, with Burnet also becoming an expert in other dimensions thanks to her role in Pokemon Radar whole dream stuff
Pokémon has consistently depicted the astral plane of dreams as a gateway to other worlds for decades, with Terapagos being the culmination of the concept.