ITT: New abilities or moves

Ambidextrous: This Pokemon can hold two DIFFERENT items.
Forgery: This Pokemon gains effects as if it were holding two of its held item inb4 double choice items=OP

So much possibility for type-effectiveness changing. such as:

Freezing Point: This Pokemon's ice type moves are supereffective against water

Corrosive : This Pokemon's poison type moves are supereffective against Steel (maybe even Rock or Ground)

Pollutant: This Pokemon's poison type moves are supereffective against Flying, Water, and Ground types.

Or all of those could become moves with the same effect, e.g: Freeze, Corrode, Pollute etc.

Heart Plate: (Water/Status) Heals the user 1/16. The Heart Plate stays, healing your Pokemon when they switch in. (Luvdisc in mind, anti-stealth rocks)