I'm adding some more information on the main Google's site, but other than that I am finishing up finals in college so I will be revising the pages slowly. Hope you guys are still interested in this idea.
I decided I really want B/W & B2/W2 tiles, but I am reusing the Trainer sprites from DP thru B2/W2. Then I will work on making some custom ones. I created a few so far that are recolored in the context of the FireRed/LeafGreen/Ruby/Sapphire/Emerald stages. Look at my Aroma Lady [link] page for an example, but I have done that with most of the Trainer Sprites that were available.