With Pokémon recently surpassing a thousand total species with the Gen IX games Scarlet & Violet, many fans have been looking back through the roster and reflecting on the franchise's long journey to this point. There are many species spread across 18 types, representing real-world animals, magical concepts, and various other ideas. Evolution is an interesting concept in Pokémon, allowing species of Pokémon to grow and adapt, becoming stronger and changing forms in the process. Leveling up is the usual way of achieving evolution in Pokémon, but there are instances where Evolution Stones can act as that catalyst instead.
Source：https://www.cbr.com/pokemon-fire-stone-compatability/
