ROM Hack PKHEX Transfer on Pokémon Platinum

[Robertoh]

Hello, a few months ago i started a new Pokémon Platinum journey, and i wanted to use my legit shiny Hoothoot from my old 2011 Pokémon SoulSilver save file so i traded it with the PKHex but now i feel like i hacked in the whole game lol, even if i didn't modified the Pokémon and my question is the Pokémon legit? Or it's a legal hack?

 

[RaptorDMG]

If it was legit in the first place I will still be legit in platinum as long as you didn't change anything in pkhex

 

[Robertoh]

If it was legit in the first place I will still be legit in platinum as long as you didn't change anything in pkhex

Thank you! I didn't change anything of him, basically it's the same Pokémon from my old Soul Silver!