What happens to FR/LG with a National Pokemon prior to the National Pokédex?

[3rd Gen Expert]

I am looking at injecting pokemon into FireRed early game that are not in the National Pokedex. I am aware there are ways to turn the National Pokedex on, and I do not want this.

What happens to a Johto/Hoenn Pokemon that is on a save like this? Can it be used normally and just not be allowed to evolve?

Is injection or ACE the only way this could happen, or did Official Distributions ever distribute pokemon to these games without the needed pokedex?

[theSLAYER]

I know some of such Pokémon were distributed, but I don’t know what happens during the redemption process, if the game save doesn’t have National dex.

Off the top of my head, all I remember is Golbat -> Crobat evolution gets cancelled.

 

beyond that, if a nat dex mon is in the save, I don’t think anything bad happens, but that’s just a guess.