An evolutionary stone is a type of rock with mysterious properties. It radiates energy that causes some Pokémon to evolve.

If a Pokémon's next stage requires the use of a stone, then it can be applied at any time, this causing instant evolution.

However, once exposed to an evolutionary stone, most Pokémon can no longer learn any more moves by leveling up. There are exceptions to this rule, however, and certain moves are exclusive to the stone-evolved Pokémon.

There are six types of evolutionary stones:

Moon Stone

• Nidorina → Nidoqueen
• Nidorino → Nidoking
• Clefairy → Clefable
• Jigglypuff → Wigglytuff
• Skitty → Delcatty

Sun Stone

• Gloom → Bellossom
• Sunkern → Sunflora

Fire Stone

• Growlithe → Arcanine
• Vulpix → Ninetales
• Eevee → Flareon

Water Stone

• Poliwhirl → Poliwrath
• Shellder → Cloyster
• Staryu → Starmie
• Eevee → Vaporeon
• Lombre → Ludicolo

Thunder Stone

• Pikachu → Raichu
• Eevee → Jolteon

Leaf Stone

• Gloom → Vileplume
• Weepinbell → Victreebel
• Exeggcute → Exeggutor
• Nuzleaf → Shiftry