Pokemon trading questions

I owned an original Soul Silver. But is playing Platinum on a rom using a flashcart. Will I be able to trade between the 2 games? Will some weird bug arise? I wanted my Luxray badly...

You can trade fine between legit cart and rom

Yes, you can trade between legit cards and ROMs on a flashcart. No bug will occur - it will be just like legit to legit trades.

yea before i got my acekard i had a pokemon diamond so i put all my good and legendary pokemon on my diamond, so far nothing bad has happened

Yeah it still works