The Pokemon Trading Card Game spread like wildfire, and the original 150 Pokemon expanded to 151 after Pokemon: The First Movie. Mewtwo and (especially) Mew were virtually unheard of at the time.

Sleep-monitoring app Pokémon Sleep has picked up $150 million in gross revenue just over one and a half years since its initial launch, according to AppMagic estimates. Now with $150m to its name, ...