>>56858948>>56858873>>56858785 DP has one of best designed regional dexes. Every pokemon in DP serves a purpose, each one carefully chosen to be in Sinnoh for a reason, unlike every other game, including Platinum. The lesser games just mass dump pokemon into regions without thinking of how they would interact with their environment or each other, or they're like BW which doesn't even make any sense and just restricts old pokemon to postgame. Platinum is soulless slop made because little children couldn't handle proper region design. DP would have the best regional dex since RBY and GSC.
First we shall start with the new regional evolutions, many of them are postgame because these powerful and rare pokemon have been recently discovered and only the best trainers can use them. The regional dex is small because only certain pokemon can survive Sinnoh's environment, great worldbuilding ruined by Platinum, why would Tropius even be in Sinnoh? Even ice types like Glalie would have trouble surviving against pokemon like Abomasnow and Sneasel, once again raped by Platinum.
And god, the teambuilding. What sets Sinnoh trainers apart is how limited they are to the pokemon that survived Sinnoh's environment. It's incredible seeing how intelligent they had to be to compensate. Volkner and Flint changed what it meant to specialize in a type. Flint was the first fire specialist to reach the E4 when they're are only 2 fire types in Sinnoh! Absolutely incredible!