How many copies did the Pokémon DS games sell?
The Nintendo DS is the best-selling handheld the series has ever had, and Pokémon's six years on it were its commercial peak per system. The figures below are Nintendo's own, as compiled in Bulbapedia's sales list, with the core games' totals current as of March 2023. Diamond and Pearl's 17.67 million makes them the best-selling Pokémon games on the DS and the fifth best-selling Pokémon games of all time.
The shape of the ledger tells the era's story. Two full generations launched on one machine, and both landed: Generation V's openers outsold most series releases despite arriving late in the hardware's life, and the Gold and Silver remakes moved nearly thirteen million on nostalgia and a pedometer. Platinum's 7.60 million makes it the strongest of the series' enhanced third versions, ahead of Crystal and Emerald as counted in the earlier batches.
The spin-offs were not a sideshow. The Explorers pair and their Sky edition, the Ranger trilogy and Conquest each cleared a million, and Blue Rescue Team, the DS's first Mystery Dungeon, cleared three. A platform where even the experiments sell is a platform a series builds an era on.