As with most Pokémon games, there are a variety of items that can be found throughout the game. These are dotted around the locations or given as gifts and sold in Poké Marts

Health Items:
Item Description: Location Price
Antidote Cures Poison Condition. Some PokéMarts $100
Awakening Cures Sleep Condition. Some PokéMarts $250
Burn Heal Cures Burn Condition. Some PokéMarts $250
Elixer Restores 10 PP to all moves. Laboratory/Snagem Hideout --
Energy Root Restores 200 HP, but bitter. The Under $800
Energypowder Restores 50 HP, but bitter. The Under $500
Ether Restores 10 PP to one move. Pyrite Cave --
Fresh Water Restores 50 HP. The Under $200
Full Heal Cures all Status Conditions. Some PokéMarts, Pyrite Cave, Laboratory. $600
Full Restore Cures all Status Conditions/Restores all HP. Under PokéMart, Laboratory. $3000
Heal Powder Cures all Status Conditions, but bitter. The Under $450
Hyper Potion Restores 200 HP. Some PokéMarts, Pyrite Building, Pyrite Cave, The Under. $1200
Ice Heal Cures Frozen Condition. Some PokéMarts $250
Lemonade Restores 80 HP. The Under $350
Max Elixer Restores all PP to all Moves. Snagem Hideout --
Max Ether Restores all PP to 1 Move. Snagem Hideout --
Max Potion Restores all HP. Under PokéMart, The Under, Pyrite Building, Snagem Hideout. $2500
Max Revive Revives Fainted Pokémon, and all HP. Snagem Hideout --
Paralyze Heal Cures Paralyze Condition. Some PokéMarts $200
Potion Restores 20 HP. Phenac City PokéMart $300
Revival Herb Revives Fainted Pokémon and all HP, but Bitter. The Under $2800
Revive Revives a Fainted Pokémon with Half its HP. Some PokéMarts, Pyrite Building, Laboratory. $1500
Soda Pop Restores 60 HP. The Under $300
Super Potion Restores 50 HP. Phenac/Agate PokéMart, Phenac City $700


Vitamins
Calcium Raises Special Attack Permanently. Agate PokéMart $9800
Carbos Raises Speed Permanently. Agate PokéMart, Pyrite Cave. $9800
Dire Hit Increase chance of Critical Hit in 1 Battle. Phenac PokéMart $650
Guard Spec. Guards against Stat Reducing moves in 1 Battle. Phenac PokéMart $700
HP Up Raises HP Permanently. Agate PokéMart, Laboratory. $9800
Iron Raises Defense Permanently. Agate PokéMart, Pyrite Cave $9800
PP Up Raises PP of 1 move Permanently. Laboratory, Snagem Hideout --
Protein Raises Attack Permanently. Agate PokéMart, Pyrite Cave $9800
Rare Candy Raises Pokémon's Level by 1. The Under, Snagem Hideout --
X Accuracy Raises Accuracy in 1 Battle. Phenac PokéMart $950
X Attack Raises Attack in 1 Battle. Phenac PokéMart $500
X Defend Raises Defense in 1 Battle. Phenac PokéMart $550
X Special Raises Special Attack in 1 Battle. Phenac PokéMart $350
X Speed Raises Speed in 1 Battle. Phenac PokéMart $350
Zinc Raises Special Defense Permanently. Agate PokéMart, Pyrite Cave $9800


Items for Shadow Pokémon Purification:
Excite Scent Purifies Shadow Pokémon to a good extent. Agate Village $800
Joy Scent Purifies Shadow Pokémon to a slight extent. Agate Village $600
Time Flute Calls Celebi to fully Purify a Shadow Pokémon. Mt. Battle, The Under, Mt. Battle Top --
Vivid Scent Purifies Shadow Pokémon to a great extent. Agate Village $1200


Key Items:
Blue ID Badge Unlocks Blue Lock in Realgam Tower (Venus) Realgam Tower --
Card Key Used to Enter Right Side of Lab. Laboratory --
Cologne Case Hold Cologne Massage scents for Purification. Agate Village --
D-Disk Moves UFO Downward. Snagem Hideout --
Data ROM Computer ROM that holds Secret Data. Laboratory --
DNA Sample (Bayleef) 1 of 3 possible DNA Samples. Laboratory --
DNA Sample (Croconaw) 1 of 3 possible DNA Samples. Laboratory --
DNA Sample (Entei) 1 of 3 possible DNA Samples. Laboratory --
DNA Sample (Mightyena) 1 of 3 possible DNA Samples. Laboratory --
DNA Sample (Misdreavus) 1 of 3 possible DNA Samples. Laboratory --
DNA Sample (Quilava) 1 of 3 possible DNA Samples. Laboratory --
DNA Sample (Raikou) 1 of 3 possible DNA Samples. Laboratory --
DNA Sample (Sudowoodo) 1 of 3 possible DNA Samples. Laboratory --
DNA Sample (Suicune) 1 of 3 possible DNA Samples. Laboratory --
Down St. Key Unlocks Door to Lab's Lower Level. Laboratory --
Ein File C Contails details about Celebi. Agate Village --
Ein File F Contains final details about Purification. The Under --
Ein File H Contains details about Hyper Mode. Pyrite Building --
Ein File P Contains details about Purification. Pyrite Cave --
Ein File S Contains details about Shadow Pokémon. Pyrite Building --
Elevator Key Used for Elevator to The Under. Pyrite Town --
F-Disk Moves UFO Forward. Mt. Battle --
Gear Part of Pyrite Town Windmill. Construction Site --
Green ID Badge Unlocks Green lock in Realgam Tower (Dakim). Realgam Tower --
Jail Key Unlocks Jail in Pyrite Town. Pyrite Town --
L-Disk Moves UFO to the Left. The Under --
Maingate Key Unlocks Main Gate to Lab. Lab Basement (Under Subway) --
Powerup Part Upgrades Kids Grid Network. The Under --
R-Disk Moves UFO to the Right. The Under --
Red ID Badge Unlocks Red Lock in Realgam Tower (Miror B). Realgam Tower --
Small Tablet Reveals Relic Stone Secrets. Agate Village --
Steel Teeth A set of Steel Teeth. The Under --
U-Disk Moves UFO Upward. Lab Basement (Under Subway) --
Yellow ID Badge Unlocks Yellow Lock in Realgam Tower (Ein). Realgam Tower --


Poké Balls
Great Ball Catches better than Poké Ball Outskirt Stand, Pyrite Building $600
Master Ball Always Catches a Pokémon. Agate Village (Eagun) --
Nest Ball Better against Lower-Level Pokémon. Outskirt Stand $1000
Net Ball Better against Bug/Water type Pokémon. Outskirt Stand $1000
Poké Ball Basic ball for catching Pokémon. Outskirt Stand $200
Premier Ball Poké Ball with a good design. Outskirt Stand --
Timer Ball Better chance of catching the longer the battle. Outskirt Stand, The Under $1000
Ultra Ball Catches better than Great Ball. Outskirt Stand, Pyrite Cave, Agaate Village, The Under, Snagem Hideout $1200


Treasures
Nugget Sells for a High Price. Tyranitar (Shadow Pokémon) --


Hold Items
Amulet Coin Doubles Earnings if Pokémon Battles. The Under --
Black Belt Increases Fighting Type Moves. Hitmontop (Shadow Pokémon) --
Blackglasses Increases Dark Type Moves. The Under --
Brightpowder Lowers opponents Accuracy in 1 Battle. PokéCoupon Exchange 10,000 PokéCoupons
Charcoal Increases Fire Type Moves. Quilava (Shadow Pokémon) --
Choice Band Multiplies power of 1st move by 1.5; Can't use other moves. PokéCoupon Exchange 10,000 PokéCoupons
Dragon Fang Increases Dragon Type Moves. Vibrava (Shadow Pokémon) --
Exp. Share Shares Exp. from Battling Pokémon. Agate Village --
Focus Band May prevent a Pokémon from Fainting. PokéCoupon Exchange 10,000 PokéCoupons
Hard Stone Increases Rock Type Moves. Sudowoodo (Shadow Pokémon) --
King's Rock May cause opponent to Flinch. PokéCoupon Exchange 10,000 PokéCoupons
Macho Brace Boosts Stats, but lowers Speed in Battle. Pyrite Cave --
Mental Herb Cures Attraction. PokéCoupon Exchange 8,000 PokéCoupons
Metal Coat Increases Steel Type Moves. Metagross (Shadow Pokémon) --
Miracle Seed Increases Grass Type Moves. Bayleef (Shadow Pokémon) --
Mystic Water Increases Water Type Moves. Croconaw (Shadow Pokémon) --
Nevermeltice Increases Ice Type Moves. Delibird (Shadow Pokémon) --
Poison Barb Increases Poison Type Moves. Qwilfish (Shadow Pokémon) --
Quick Claw Increase chance of Attacking first. Agate Village, PokéCoupon Exchange 10,000 PokéCoupons
Scope Lens Increases chance for Critical Hit. PokéCoupon Exchange 10,000 PokéCoupons
Sharp Beak Increases Flying Type Moves. Skarmory (Shadow Pokémon) --
Silk Scarf Increases Normal Type Moves. Agate Village --
Silver Powder Increases Bug Type Moves. Ariados (Shadow Pokémon) --
Soft Sand Increases Ground Type Moves. Piloswine (Shadow Pokémon) --
Spell Tag Increases Ghost Type Moves. Misdreavus (Shadow Pokémon) --
Twistedspoon Increases Psychic Type Moves. Meditite (Shadow Pokémon) --
White Herb Restores Stats to normal. Phenac City, PokéCoupon Exchange 8,000 PokéCoupons