Moves:
- I would expand Unown's movepool to include all the "Power" moves: Ancient Power, Cosmic Power, Earth Power, Extrasensory, Nature Power, Power Split, Power Swap, Secret Power, Stored Power, & Superpower.
- If they bring back Hidden Power: Ditch the IV mechanic, let you pick what its Type (including Normal & Fairy), let you pick its Category, make its Power 50. Bonus Additions: If you choose Physical you also get to pick whether it makes contact or not, you can have it target the opposite defense stat (so if it was Physical it would calculate damage using the target's Special Defense, if it was Special uses target's Defense).
- Unown Signature Move: Unknown Power (Psychic. Special. Power ?. Target adjacent. (Multi-strike). Power is amount of non-fainted Unown in your party x5; Number of strikes is equal to amount of non-fainted Unown in your party).
Items:
I have an idea for 6 items collectively called the "Unknown Tablets". As long as there are two or more unfainted Unown holding an Unknown Tablet on your team, all of the Unown's non-HP stats are doubled and share their Abilities (explained below). If an Unown knows Hidden Power it'll change into the Type of the Hidden Power and give Hidden Power the following bonuses: increase Power by 1.5x, give it +1 Priority, and it ignores immunities & resistances. The six Unknown Tablets are: Unknown Almanac (Description: History of an unknown year.), Unknown Lexicon (Dictionary of an unknown language.), Unknown Memoir (Biography of an unknown person.), Unknown Poem (Stanzas from an unknown epic.), Unknown Song (Lyrics to an unknown music.), Unknown Tale (Legend from an unknown culture.)
Ability:
Depending on the Unown's Letter/Symbol they have a second Ability. All Unown holding Unown Tablets share their Abilities (as long as the Unown isn't fainted): A/ngry=Intimidate, B/ear=Sturdy, C/hase=Hustle, D/irect=Mold Breaker, E/ngage=Infiltrator, F/ind=Frisk, G/ive=Tinted Lens, H/elp=Regenerator, I/ncrease=Power Spot, J/oin=Protean, K/eep=Shadow Tag, L/augh=Dazzling, M/ake=Beast Boost, N/uzzle=Friend Guard, O/bserve=Analytic, P/erform=Technician, Q/uicken=Speed Boost, R/eassure=Magic Guard, S/earch=Download, T/ell=Soundproof, U/ndo=Natural Cure, V/anish=Clear Body, W/ant=Trace, X/XXXX=Moody, Y/ield=Cursed Body, Z/oom=Compound Eyes, ?/What?=Unaware, !/Whoa!=Super Luck