Due to my inability to find my old GBA I think we will be going with a "one of each type" restriction. I did see a GBA for sale at a local pawnshop for $30 so I might pick that up to facilitate a set party challenge I'm the future.
So, we still get to choose which pokemon we get off breeders? I thought it would be just in-game catches now, but that's cool.
For the older games getting Pokemon from breeders would be impossible. Instead we will use a single type challenge.