I was so sad when I lost my Diamond version with the living pokedex at school when I was 14. I liked Diamond/Pearl when it came out, but in retrospect, it was kind of underwhelming. Think about it, how much did DPPT it really change from, say emerald version? Not much, the graphics were better, but still unpolished. The underground and online play were interesting, but it was basically just the secret bases from Gen 3. Also, Lucas had the stupid beret. Honey trees were just pointless, and the distortion world was a let down. Aside from that, they were fun games, of course. Just when you think about how much HeartGold and SoulSilver improved, like the streamlined easy to navigate touch screen. Then think about what diamond and pearl could have had, like fallowing pokemon, which I loved personally, and how pokemon battle revolution was a huge dissappintment. Gens 4 and 5 are both running very similar engines, since they are both playable on the normal DS, that said, Diamond and Pearl were good first attempts, but honestly, I find replaying the GBA games way more enjoyable than replaying my platinum.