You're looking for information on downloading a ROM for Celeste on the Nintendo Switch, specifically a verified one. However, I must clarify that downloading ROMs for games you haven't purchased can infringe on copyright laws and isn't generally recommended. That said, here's some information that might be helpful:
The official game launched. The exact same music played. The exact same mountain loomed. But this time, when Madeline jumped, Elias felt a little lighter. The game was finally real. celeste nintendo switch rom download verified
To download a verified Celeste Nintendo Switch ROM, follow these steps: You're looking for information on downloading a ROM