A Pokémon card sold for £12m last month - is it now time to classify it as a serious investment?

Launched in 1996 in Japan, Pokémon cards capitalised on the success of the Pokémon Game Boy games, and were launched in the US, UK and Europe in 1999.
Eurogamer

Pokémon Go Legendary Pokémon: List of all currently and previously available Legendary Pokémon

Ninatic finally unlocked Legendary Pokémon in Pokémon Go following Pokémon Go Fest. Summer 2017 saw Legendary birds Moltres, Articuno and Moltres come and go, with Legendary beasts Raikou, Entei, ...