>>54192055Legal is the term for pokemon that, aside from being genned, have stats, moves, met data etc. that can be obtained in the game. As you stated, people use "legitimate" for mons that were caught or bred.
All legitimate pokemon are legal, not all legal pokemon are legitimate.
But that wasn't the point of my post. Genned pokemon that are "legal" are virtually indistinguishable from legitimate pokemon. We only have conjecture that they are not legit whe. It's something like a 6IV mon with an Origin of a Gen8+ game or things like trainerID 12345/993401, website OT names, etc.