Meowth/Persian isn't possible to obtain in Pokemon Let's Go Pikachu, so it seems. So it stands to reason that it should probably say something like "Unobtainable" or "Trade from Let's Go Eevee" rather than misinforming anyone who's looking for the location of the mon by telling them to use a mechanic that's not even in the game.
Yes that's an auto-generated message that happens if a Pokemon is not available. It checks whether the Pokemon has an evolution or pre-evolution and says to evolve/breed as appropriate. But when programming it I never considered they'd remove breeding in a future game!
Anyway it's now fixed. LGPE has been a weird one, my code already has loads of "exceptions" for LGPE like not showing an Ultra Sun/Moon tab for Meltan, and not showing an LGPE tab for non-Kanto Pokemon.