When PEGI rates a game that hasn't yet been announced, it often gives an indication that said game is coming, and in this case we have a rating for Detective Pikachu: Birth of a New Duo, in which the yellow Pokémon gains human skills to help with investigating crimes.
Serebii spotted the item at the European rating board website with a release date pointing to December 31, 2020, which is likely a placeholder. There's good reason to trust that it's coming, though, as a live-action film based on the same story is in production.
Do you want to see Pikachu as a detective?