Forum:Can aliens from different universes than Halo be used in Fanon?

I am a semi-new user, so I don't know if this has been discussed already, but can aliens that are from different games or stories than Halo be used in Fanon? For example, could someone find a way to add, say, the krogans from Mass Effect into the Halo Fanon Universe? It would certainly make things a little more interesting, since it would open tons of new factions to fanon. And if the answer to this question is a definite no, could you take said species, rename it, and give it pretty much all of the characteristics it has in the game or movie that it is actually from? Just looking for people's opinion. Actene 00:59, 16 October 2008 (UTC)