Galactic Fork
A little fluff between the ears never did any harm...
But no Pokemon Mystery Dungeon game has sold over 1 million:
[GBA] Pokemon Mystery Dungeon: Red Rescue Team (Pokemon Co.) {2005.11.17} - 112,898 / 718,129
[NDS] Pokemon Mystery Dungeon: Blue Rescue Team (Pokemon Co.) {2005.11.17} - 123,556 / 743,990
[NDS] Pokemon Mystery Dungeon: Explorers of Time (Pokemon Co.) {2007.09.13} - 300,295 / 804,118
[NDS] Pokemon Mystery Dungeon: Explorers of Darkness (Pokemon Co.) {2007.09.13} - 268,593 / 709,844
[NDS] Pokemon Mystery Dungeon: Explorers of Sky (Pokemon Co.) {2009.04.18} - 141,771 / 414,000
=P
Like the main line, they are released 2 colors at a time. See the dates. People usually count them together. Time and Darkness came out together, with Sky coming out alone a bit later (like the 3rd colors in the main line games).