

Era 2008-2009
Platinum (Pt)
2008-2009: the Pt1 to Pt4 sets.
The Platinum sets (2008-2009) extend the Diamond & Pearl era, with the Pt1 to Pt4 code in the bottom right corner, as on this Metagross (Pt3), and SP Pokémon.
Good to know Holos from this era often have a sparkling pattern across the whole card.