Name: Airborne Strike
Existing Move?: No
Category: Physical
Type: Flying
PP: 24 Max
Effect: 90 BP, 10% Chance to lower the opponent's Defense by 1.
Misc.: Contact
Z-Move: Supersonic Skystrike - 160 BP
Niche: A strong, recoil-less, physical Flying-type move that give Pokemon unable to learn Brave Bird a good STAB option, and even as coverage, Flying is a pretty decent offensive typing, hitting Pokemon like Tangrowth and Mega Medicham.
Potential Pokemon With This Move: Unfezant, Fearow, Staraptor, Talonflame, Gyarados, Thundurus(-T), Tornadus(-T), Skarmory, Dragonite, Salamence, Gliscor, Hawlucha, Aerodactyl, Crobat, Toucannon, Arcehops, Jumpluff, etc. (Flying-types, especially those with limbs, in general)
Name: Magic Room
Existing Move?: Yes
Category: Status
Type: Psychic
PP: 16 Max
Effect: For 5 turns, the opponent's held items have no effect unless it is a Mega Stone or Z-Crystal. Under Magic Room, Judgement's type is always Normal.
Misc.: N/A
Z-Move: Raises the user's Special Attack by 2 stages
Niche: Removing the ability to use items can be huge in the right situations, like shutting down Choice Scarf users, eliminating Focus Sashes, and preventing the use of helpful berries. Also, the Z-Move is a Nasty Plot on top of this and can work well in combination with negating Sashes if hazards aren't up.
Potential Pokemon With This Move: Everything that learned it before + Musharna, Girafarig, Victini, Porygon-Z, Starmie, Sylveon