Health Items

Potion - - Minor Heals Pokemon
Super Potion - - Heals Pokemon
Hyper Potion - - Heals Pokemon
Max Potion - - Completely Heals Pokemon
Full Restore - - Completely Heals All Pokemon

Ice Heal - - Heals Frozen
Antidote - - Cures Poison
Burn Heal - - Heals Burn
Awakening - -Cures Sleep
Paralyze Heal - -Cures Paralysis
Full Heal - - Cures All Status Effects

Revive - - Revives Fainted Pokemon
Max Revive - - Revives Fainted Pokemon And Completely Heals It
Sacred Ash - - Revives All Fainted Pokemon

Fresh Water - - Heals Pokemon
Soda Pop - - Heals Pokemon
Lemonade - - Heals Pokemon
MooMoo Milk - - Heals Pokemon

Energy Powder - - Heals Pokemon
Energy Root - -Heals Pokemon
Heal Powder - - Cures Any Status Problem
Revival Herb - - Revives Fainted Pokemon
Lava Cookie - - Cures Any Status Condition

Flutes

Red Flute - - Disrupts Attraction
Blue Flute - - Cures Sleep
Black Flute - - Repels Weak Pokemon
White Flute - - Allows You To Meet Wild Pokemon More Frequently
Yellow Flute - - Cures Confusion

PokeBalls

PokeBall - - The Basic Ball
Great Ball - - Catches Pokemon Better Than A PokeBall
Ultra Ball - - Catches Pokemon Better Than Great Ball
Master Ball - - Always Catches Pokemon

Net Ball - - Best Against Bug-Type and Water-Type Pokemon
Dive Ball - - Best Against Pokemon On The Ocean Floor
Nest Ball - - Best Against Low Level Pokemon
Timer Ball - - Better Success Rate As The Battle Rages On
Safari Ball - - Use Against Pokemon In Safari Zone
Luxury Ball - - A Pokemon Caught With This Ball Will Become Friendlier
Repeat Ball - - Best Against Kind Of Pokemon Already Caught
Premier Ball - - Same As PokeBall Except For Design

Helpful Items

Repel - - Repels Weak Wild Pokemon
Super Repel - - Repels Weak Wild Pokemon
Max Repel - - Repels Weak Wild Pokemon

Fluffy Tail - - Provides Escape From Battle With Wild Pokemon
Escape Rope - - Provides A Quick Escape From Caves Or Dungeons

Skill And Level Increasing Items

Sun Stone - - Evolves Certain Pokemon
Fire Stone - - Evolves Certain Pokemon
Leaf Stone - - Evolves Certain Pokemon
Moon Stone - - Evolves Certain Pokemon
Water Stone - - Evolves Certain Pokemon
Thunder Stone - - Evolves Certain Pokemon

Rare Candy - - Raises Pokemon Level By 1
Rare Candybar - Raises Pokemon Level By 5