Background
Japanese XY Promo 208/XY-P is Poncho-wearing Pikachu in a Mega Charizard Y cloak, a Japan-only full-art holo by Kouki Saitou. It shipped in the Mega Charizard Y Poncho-wearing Pikachu Special Box on 1 January 2016, during Pokémon's 20th year. No English card followed.
The box also carried booster packs, a deck box, and matching sleeves. The sister promo is Mega Charizard X 207/XY-P. The attack Crimson Dive? points at M Charizard-EX's Crimson Dive from Flashfire.
Collectors file it with both Pikachu and Charizard piles. Starry holo stock is part of the usual XY-P look on this sheet.