Extremely broken new item: Aiming Mark. It removes immunities, meaning that Psychic moves can hit Dark Pokémon, Poison can hit Steel, etc. This basically kills stall: ghosts can no longer block Rapid Spin. Even if you predict a switch to a spinner and double switch to a Ghost with Magic Room (a move that stops items from taking effect for five turns) you have to be faster than the spinner and be able to beat it one-on-one. With something like Starmie holding Aiming Mark, this will be pretty much impossible to do.
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I'm never gonna dance again, Aspie feet have got no rhythm.