My suggestion is...... well when I am playing my Pearl, I always want a complete list of pokemon in a certain route. Like on Serebii, the only place that says where the pokemon is found is in the poke'dex, but I've always wanted like a list of what pokemon are at which route, if that makes sense. Like maybe I'm not looking for a specific pokemon, and I want to fill up my Sinnoh Dex, I don't exactly know if I saw/caught every pokemon on the route I was on. Like lets say that there is a rare Chingling on Route 214 (I picked a random route) but I just skimmed the route, and I wanted to see every pokemon in the route, but I wasn't sure what pokemon were in that route. And the only way to find the exact pokemon on that route, is to look through every dex entry and see if that pokemon is located on Route 214. So I was thinking of like a page dedicated to saying which Route contains which pokemon. If that makes sense....