Items

Dragon Scale
What it does: Powers Up Dragon
Pokemon(s) that hold this item:
Bagon
Horsea

Spell Tag
What it does: Powers Up Ghost
Pokemon(s) that hold this item:
Banette
Shuppet
Dusclops
Duskull

Kings Rock
What it does: Flinch + Evolve
Pokemon(s) that hold this item:
Hariyama

Metal Coat
What it does: Powers Up Steel + Evolve
Pokemon(s) that hold this item:
Magnemite

Poison Barb
What it does: Powers Up Poison
Pokemon(s) that hold this item:
Roselia

Soft Sand
What it does: Powers Up Ground
Pokemon(s) that hold this item:
Trapinch

Leftovers
What it does: HP Restoration
Pokemon(s) that hold this item:
Spheal

Sharp Beak
What it does: Powers Up Flying
Pokemon(s) that hold this item:
Doduo
Pidgey

Miracle Seed
What it does: Powers Up Grass
Pokemon(s) that hold this item:
Oddish

Silver Powder
What it does: Powers Up Bug
Pokemon(s) that hold this item:
Heracross

Darkglasses
What it does: Powers Up Dark + Evolve
Pokemon(s) that hold this item:
Poochyena

Pink Bow
What it does: Powers Up Normal
Pokemon(s) that hold this item:
Phanpy

Polkadot Bow
What it does: Powers Up Normal
Pokemon(s) that hold this item:
Whismur

Exp Share
What it does: Shares exp earned with the pokemon you attached the item to.
Pokemon(s) that hold this item:
Wynaut
Wobbuffet

Magnet
What it does: Powers Up Electric
Pokemon(s) that hold this item:
Pichu
Pikachu
Raichu

Scope Lens
What it does: Critical hit 3/5 of the time in which you attack.
Where to get it: Trading in Team Stat points.
Rank: Sergeant
Pokemon(s) that hold this item:
Absol

Charcoal
What it does: Powers Up Fire
Pokemon(s) that hold this item:
Vulpix

Twisted Spoon
What it does: Powers Up Psychic + Evolve
Pokemon(s) that hold this item:
Abra

Hard Stone
What it does: Powers Up Rock
Pokemon(s) that hold this item:
Aron

Team Boost
What it does: Increases faction gains to 300 after knocking an opposite affiliate opponent out if the opponent's pokemon is weaker. 750 points if the opponent is stronger.
Where to get it: Trading in Team Stat points.
Rank: Grunt

Amulet Coin
What it does: Doubling cash earned after a battle.
Note: The pokemon who is out when the opponent faints has to have the coin on.
Where to get it: Trading in Team Stat points.
Rank: Private

Power Boost
What it does: Makes moves do 10% more damage. (Toxic/etc don't count)
Where to get it: Trading in Team Stat points.
Rank: Captain

Elemental Stone
What it does: Makes moves do 50% more damage. (Toxic/etc don't count) and increases your chance of critical hit to 4/5.
Where to get it: Trading in Team Stat points.
Rank: Colonel

Rare Metal
What it does: Nothing (Check 'How to use it')
How to use it: 6 Rare Metals attached on your roster set + a specific pokemon as your starting pokemon + evolution gym unlocks Twilight Orb or Twilight Rod
Where to get it: Defeating the Unown Tower in Battle Towers.

Twilight Orb
What it does: Unlocks Unown Tower Phase #1.
Where to get it: From rare metals + Fire pokemon + Evolution gym.
How to unlock phase: Just have your starting pokemon with the item attached and go to the Unown Tower.

Twilight Rod
What it does: Unlocks Unown Tower Phase #2.
Where to get it: From rare metals + Water pokemon + Evolution gym.
How to unlock phase: Just have your starting pokemon with the item attached and go to the Unown Tower.

Twilight Rod + Twilight Orb
What it does: Unlocks Unown Tower Phase #3.
How to unlock phase: Just have your starting first two pokemon with the item attached and go to the Unown Tower.

Rough Diamond
What it does: Unlock Smooth Diamond
How to use: Bring 10 Rough Diamonds to the Research Lab and trade it in.
Pokemon(s) that hold this item:
Every Pokemon in the Maps.

Rough Pearl
What it does: Unlock Smooth Pearl
How to use: Bring 10 Rough Pearls to the Research Lab and trade it in.
Pokemon(s) that hold this item:
Every Pokemon in the Maps.

Smooth Diamond
What it does: Evolves Electabuzz into Electivire.
How to use:

Smooth Pearl
What it does: Evolves Magmar into Magmortar.
How to use:

X Special
What it does: Boosts Special Attack
Pokemon(s) that hold this item:
Articuno

X Defense
What it does: Boosts Defense
Pokemon(s) that hold this item:
Moltres

X Attack
What it does: Boosts Attack
Pokemon(s) that hold this item:
Zapdos

X Accuracy
What it does: Boosts Accuracy
Pokemon(s) that hold this item:
Kecleon

X Speed
What it does: Boosts Speed
Pokemon(s) that hold this item:
Voltorb

Note:
When attached, X Special (Attack), Attack, Defense, and Speed add 20 points to your base stat in that category meaning that your move will do more damage.

X Accuracy makes whatever move you're using 10% more accurate. This includes OHKO moves in addition to all the other moves in the RPG.


Top 5 Finishers in Seafoam Islands: Magikarp Cup
Prize: Mystic Water
What it does: Boosts Water Attacks + Evolve

Place 1st in Seafoam Islands: Gyarados Cup
Prize: Focus Band
What it does: May prevent Pokemon from fainting (really small chance).

And what about "where to find items." You only listed them. Can you please tell me i wanna evolve some pokemon.