What are the items which have same effect during a battle?

Some items have same effect during a battle.

For example, Mystic Water and Sea Incense have the same effect of increasing Water type moves in a battle.

Please exclude the effects these items have on the move Fling, as well as out-of battle effects (such as Incense effects on breeding).

Pleaselog inorregisterto add a comment.

Increases the power of Fighting-type moves.

Increases the power of Dark-type moves.

Increases the power of Fire-type moves.

Increases the power of Dragon-type moves.

Increases the power of Rock-type moves.

Increases the power of Electric-type moves.

Increases the power of Grass-type moves.

Increases the power of Water-type moves.

Increases the power of Ice-type moves.

Increases the power of Poison-type moves.

Increases the power of Flying-type moves.

Increases the power of Bug-type moves.

Increases the power of Ground-type moves.

Increases the power of Ghost-type moves.

Increases the power of Psychic-type moves.

Doubles prize money if held. (Don’t know if I should include this)

Lowers the opponent’s accuracy.

Holder always attacks last.

May cause opponent to flinch.

Increases critical-hit ratio.

Please tell me if I have missed anything.

Hope this helps :)