Generation IV: Sinnoh.
Sinnoh is the cold, deliberate one. Mt. Coronet runs the spine of the map. The legendaries deal in time, space, and antimatter. The Underground let you dig fossils and trap your friends in giant pit traps via DS wireless. And the Distortion World remains one of the strangest setpieces in mainline Pokémon history.
The mechanic that defined Gen IV
Physical / Special split, online battling, Wi-Fi trades.
Gen 4 broke moves apart by classification (Physical vs Special) instead of by type. Suddenly Crunch became a physical move, Ice Beam stayed special, and every Pokémon got a clean second offensive option. Wi-Fi battles via Nintendo Wi-Fi Connection turned the metagame into a global event.
Signature moves introduced this generation: Stealth Rock, Close Combat, Flare Blitz, Bullet Punch, Earth Power.
Starters
Box legendaries
Top 12 by base-stat total
Key dates
- Diamond and Pearl release in Japan on Nintendo DS.
- Diamond and Pearl release in North America.
- Platinum releases in Japan with the Distortion World and Giratina-O.
- HeartGold and SoulSilver remakes ship.
- Brilliant Diamond and Shining Pearl release on Switch.
- Pokémon Legends: Arceus reframes Sinnoh as Hisui, retconning Gen 4 with new regional forms.
Iconic trainers: Roark, Volkner, Cynthia, Cyrus, Barry (Rival).
Games in this generation: Diamond, Pearl, Platinum, HeartGold, SoulSilver, Brilliant Diamond, Shining Pearl, Legends: Arceus.
Full roster (107 Pokémon)
Legacy
The physical / special split is the single most-cited mechanic in Pokémon competitive history. It rebalanced every move from 1996 forward in one patch. Sinnoh's lore (Arceus, the creation trio, Hisui) also gives modern Pokémon its closest thing to capital-M Mythology.