What are all items that boost a stat/move by 1.5x?

Question

Like Assault Vest boosts 1.5x Sp.Def.

Comments

To be honest I don't really get the question
Do the berries count ?

Answer 1

Assult Vest -Increases Sp.D 1.5x
Soul Dew -Increases ONLY Lati@s Sp.D and Sp.A by 1.5 x
Metal Powder-Increases Sp.D and Def ONLY Ditto
Eviolite-Increases Sp.D and Def 1.5x but Pokemon holding it has to be able to evolve

The berries half the amount of Super Effective damage......does that count ?

Occa Berry - Weakens foe's super effective Fire-type move 
Passho Berry - Weakens foe's super effective Water-type move
 Wacan Berry -Weakens foe's super effective Electric-type move
 Rindo Berry -Weakens foe's super effective Grass-type move
 Yache Berry -Weakens foe's super effective Ice-type move
 Chople Berry -Weakens foe's super effective Fighting-type move 
Kebia Berry -Weakens foe's super effective Poison-type move
Shuca Berry -Weakens foe's super effective Ground-type move 
Coba Berry -Weakens foe's super effective Flying-type move 
Payapa Berry- Weakens foe's super effective Psychic-type move 
Tanga Berry - Weakens foe's super effective Bug-type move
 Charti Berry - Weakens foe's super effective Rock-type move
Kasib Berry - Weakens foe's super effective Ghost-type move 
Haban Berry - Weakens foe's super effective Dragon-type move
 Colbur Berry - Weakens foe's super effective Dark-type move
 Babiri Berry - Weakens foe's super effective Steel-type move

Comments

You forgot Choice Items; Choice Band, Choice Scarf and Choice Specs.

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Someone edited my question, so its slightly different from what I originally asked. Just to clarify though, Choice items weren't what I was looking for.

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Ah, I see.
Blame Le Scraf >.>

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Wow that's a lot of work...