Can I get problems to my ROM if I give myself a Pokémon that is exclusive of the other version?

[Nidarian]

I recently started playing Pokémon Black 2 on my old DSi and I wanted to catch a Solosis for my team, but I forgot that is an exclusive Pokémon for White 2. Can I give myself a Solosis using Pkhex even if I'm playing the other version or this will give me problems?

[SkyLink98]

Given that you could legitimately obtain a Solosis via trading, there's no reason to worry about that.

You can safely use PKHeX to gen a Solosis.