The HeartGold & SoulSilver series is five sets, all released between February and November 2010: HeartGold SoulSilver, HGSS Black Star Promos, Unleashed, Undaunted and Triumphant. The three main expansions after the first set (Unleashed, Undaunted and Triumphant) each list exactly one card past the printed size, and so does the opening set. The promos add 25 cards. A short series, so ticking it off from the first set to the last is quick.
HeartGold & SoulSilver sets by release date
| Set | Released | Numbered cards | Secret rares |
|---|---|---|---|
 HeartGold SoulSilver | Feb 2010 | 123 | 1 |
 HGSS Black Star Promos | Feb 2010 | 25 | — |
 Unleashed | May 2010 | 95 | 1 |
 Undaunted | Aug 2010 | 90 | 1 |
 Triumphant | Nov 2010 | 102 | 1 |