create implication dawn_stone -> evolutionary_stone
create implication dusk_stone -> evolutionary_stone
create implication fire_stone -> evolutionary_stone
create implication leaf_stone -> evolutionary_stone
create implication moon_stone -> evolutionary_stone
create implication shiny_stone -> evolutionary_stone
create implication sun_stone -> evolutionary_stone
create implication thunder_stone -> evolutionary_stone
create implication water_stone -> evolutionary_stone
They are all categorized as evolutionary stones in every game. The Everstone is also considered an evolutionary stone, but it's an odd case as it actually prevents* Pokémon from evolving.
*With the exception of Kadabra starting in Generation V.