You can call it canon at any time because thats what the multiverse implies, but at the same time those promotional cards were just card styles and not actual standalone cards like the Street Fighter or Walking Dead Secret Lairs
You can't stop a Teferi, Time Raveler, though
Its very first Pro Tour, it took home the trophy in the very able hands of Alexander Hayne, setting off the Miracles revolution
The cards appear slightly more shiny than real cards, but otherwise very authentic
Still, it enabled you to dig deeper into your deck
However, as modern Pokemon cards began soaring from the end of 2024 through 2025, Gengar was among the leaders, exploding to its current market price and putting considerable distance between it and the Espeon VMAX from the same set