Can someone of repute confirm for me exactly how attached items work in link battles?
I know that they do not double the STAB bonus, as originally thought. I used No$GMB to pit two Poliwraths against each other, one with Mystic Drop and one without, and their Surfs did the same amount of damage.
Then I wanted to test the statement that it they give the STAB to those that ordinarily wouldn't have it, so I tried fighting two identical Sandslashes, except that one had Pink Ribbon (supposed to boost Normal attacks) and one had Teacher's Claw (always goes first on the initial turn). Both used the same attack on the same turn (either Swift or Slash). The one with Teacher's Claw almost always went first on the first turn (note the "almost"), but there was no significant difference in the amount of damage dealt. I then tried matching the Teacher's Claw Sandslash (Speed 62) with a faster opponent (Oodairu, Speed 74). Although it never went first on the initial turn, I did see the Sandslash go first on a later turn.
Finally, I tried pitting two identical Oodairu's against each other, one with Pink Ribbon. Again, there was no significant difference in the damage dealt.
So, I'm stumped. Does anyone know for sure what effect items have in link battles?