Pokmeon Pokopia's retail release will be a game-key card

https://www.gematsu.com/2025/11/pokemon-pokopia-launches-march-5-2026

The physical edition will ship on a game-key card worldwide, as revealed by a new video about game-key cards (English, Japanese) released today by Nintendo.

I think this is the first big-ish Nintendo release to use a key-card.