Unova Emerald Evolution Items.

You can buy all of them in the Battle Frontier using Battle Points.

• Fire Stone: Pokéball in Fiery Path, Poké Ball in Magma Hideout 2F 1R, Trade Red Shards in the Diving Treasure House.
• Water Stone: Pokéball in Abandoned Ship Hidden Floor Rooms, Poké Ball in Sootopolis City, Trade Blue Shards in the Diving Treasure House.
• Thunder Stone: Pokéball in New Mauville, Trade Yellow Shards in the Diving Treasure House.
• Leaf Stone: Poké Ball in Route 119, Trade Green Shards in the Diving Treasure House.
• Sun Stone: NPC at Mossdeep City Space Center 1F, Rare item on Solrock.
• Moon Stone: Pokéball in MeteorFalls 1F 1R. Rare Item on: Cleffa, Clefairy, Clefable, Jigglypuff, Wigglytuff, Lunatone.
• Shiny Stone: Pokéball in Route 118.
• Dusk Stone: Pokéball in Mt Pyre 2F.
• Dawn Stone: Battle Frontier only (not needed for the reginal dex).
• Dragon Scale: Battle Frontier only (not needed for the reginal dex).
• Upgrade: Battle Frontier only (not needed for the reginal dex).
• Protector: Battle Frontier only (not needed for the reginal dex).
• Electirizer: Poké Ball in New Mauville. Rare Item on Elekid.
• Magmarizer: Poké Ball in Scorched Lab. Rare Item on Magby.
• Dubious Disc: Battle Frontier only (not needed for the reginal dex).
• Reaper Cloth: Battle Frontier only (not needed for the reginal dex).
• Oval Stone: Battle Frontier only (not needed for the reginal dex).
• Metal Coat: Pokéball in Sootopolis City. Rare Item on: Magnemite, Magneton, Skarmory, Beldum, Bronzor, Bronzong.
• Razor Claw: Pokéball in Seafloor Cavern Room 4.
• Razor Fang: Pokéball in Aqua Hideout B1F.