Aron (Careful nature, Sturdy/Rock Head, has Stealth Rock, Superpower, Body Slam, Head Smash, all in Dream Balls)
Beldum (Adamant nature, Clear Body)
Bulbasaur (Calm nature, Chlorophyll, has Grass Whistle, Grassy Terrain, Giga Drain, and Petal Dance, all in Nest Balls)
Bunnelby (Adamant nature, Huge Power)
Carbink (Bold nature, Clear Body/Sturdy)
Chansey (Bold nature, Natural Cure, has Present, Aromatherapy, Metronome, Seismic Toss, all in Love Balls)
Charmander (Adamant/Timid nature, Solar Power, has Crunch, Dragon Dance, Dragon Pulse, Outrage, all in Luxury Balls)
Chespin (Impish/Adamant nature, Bulletproof, has Spikes, Synthesis, Belly Drum, Quick Guard, all in Nest Balls)
Corphish (Adamant nature, Adaptability, has Dragon Dance, Aqua Jet, Knock Off, Superpower, all in Dive Balls)
Croagunk (Adamant nature, Dry Skin, has Fake Out and Drain Punch)
Cleffa (Bold nature, Magic Guard, has Amnesia, Aromatherapy, Stored Power, Wish, all in Moon Balls)
Cyndaquil (Timid nature, Blaze, has Extrasensory, Crush Claw, Flame Burst, Flare Blitz, all in Luxury Balls)
Darumaka (Adamant nature, Hustle)
Deino (Timid nature, Hustle, has Earth Power, Head Smash, Fire Fang, Ice Fang, all in Luxury Balls)
Dratini (Adamant nature, Marvel Scale, has Dragon Dance)
Drilbur (Adamant nature, Sand Rush/Mold Breaker, has Rapid Spin)
Durant (Jolly nature, Hustle/Truant)
Flabebe (Calm nature, Flower Veil, White Flower, all in Premier Balls)
Feebas (Bold nature, Swift Swim/Oblivious)
Ferroseed (Careful nature, Iron Barbs, has Leech Seed and Stealth Rock)
Fletchling (Adamant nature, Gale Wings, has Tailwind, all in Luxury Balls)
Frillish (Calm nature, Water Absorb/Cursed Body, has Recover, Pain Split, Mist, Acid Armor, all in Dive or Heal Balls)
Froakie (Timid nature, Protean, has Toxic Spikes, in Luxury or Dive Balls)
Gastly (Timid nature, Levitate, has Clear Smog, Perish Song, Disable, Ice Punch, all in Moon Balls)
Gible (Jolly nature, Rough Skin, has Outrage)
Goomy (Bold nature, Hydration/Sap Sipper/Gooey, has Acid Armor, Counter, Iron Tail, and Curse, all in Luxury Balls)
Gligar (Impish nature, Immunity)
Hawlucha (Adamant nature, Limber/Unburden, all in Luxury Balls)
Helioptile (Timid nature, Dry Skin, has Glare, all in Ultra Balls
Heracross (Adamant/Jolly nature, Guts/Moxie, has Double-Edge, Focus Punch, Megahorn, Rock Blast, all in Dream Balls)
Honedge (Adamant/Quiet nature, No Guard)
Horsea (Modest nature, Swift Swim/Sniper, has Water Pulse)
Kangaskhan (Adamant nature, Scrappy, all in Dream Balls)
Koffing (Bold nature, Levitate, has Toxic Spikes, Destiny Bond, Pain Split, Stockpile, all in Moon Balls)
Klefki (Bold nature, Prankster, all in Premier Balls)
Larvesta (Timid nature, Flame Body)
Larvitar (Adamant nature, Guts, has Stealth Rock, Ancient Power, Dragon Dance, Pursuit, all in Heavy Balls)
Litwick (Modest nature, Flash Fire/Flame Body, has Heat Wave)
Magikarp (Jolly nature, Swift Swim/Rattled, all in Dive Balls)
Machop (Adamant nature, No Guard, has Ice Punch, Fire Punch, Bullet Punch, Knock Off, all in Heavy Balls)
Mareep (Modest nature, Static, has Agility, Iron Tail, Charge, Eerie Impulse, all in Fast Balls)
Marill (Adamant nature, Huge Power, has Aqua Jet, Superpower, Belly Drum)
Mawile (Adamant nature, Intimidate, has Fire Fang, Thunder Fang, Ice Fang, Metal Burst, all in Moon Balls)
Meditite (Adamant nature, Pure Power, has Drain Punch, Fake Out, Bullet Punch, Psycho Cut, all in Love Balls)
Mienfoo (Jolly nature, Regenerator, has Knock Off, in Luxury Balls)
Miltank (Impish nature, Scrappy/Thick Fat, all in Heal Balls)
Noibat (Timid nature, Infiltrator, has Tailwind, Outrage, Switcheroo, Snatch, all in Luxury Balls)
Nidoran (Modest nature, Hustle)
Pawniard (Adamant nature, Defiant, has Sucker Punch, Pursuit, Psycho Cut, Stealth Rock, all in Luxury Balls)
Phantump (Impish nature, Natural Cure/Harvest)
Pineco (Relaxed nature, Sturdy, has Stealth Rock, Toxic Spikes)
Pinsir (Jolly nature, Mold Breaker/Moxie, has Fury Cutter, Close Combat, and Quick Attack, all in Luxury Balls)
Poliwag (Calm nature, Swift Swim, has Encore)
Ralts (Timid nature, Trace/Synchronize, has Encore, Ally Switch, Destiny Bond, Shadow Sneak, all in Love Balls)
Shroomish (Adamant nature, Poison Heal/Quick Feet, has Bullet Seed)
Sableye (Careful nature, Prankster, has Recover, Metal Burst, Trick, Sucker Punch, all in Luxury Balls)
Scyther (Adamant nature, Technician, has Defog)
Shellder (Jolly nature, Skill Link, has Rock Blast and Icicle Spear)
Shellos (Bold nature, Storm Drain, has Clear Smog, Counter, Mirror Coat, Curse, all in Heal Balls, Pink Variant)
Skarmory (Impish/Careful nature, Sturdy, has Brave Bird, Curse, Stealth Rock, Whirlwind, all in Heavy Balls)
Snover (Quiet nature, Snow Warning, has Mist, Avalanche, Seed Bomb, Leech Seed, all in Premier Balls)
Slowpoke (Bold nature, Regenerator, has Block, Belly Drum, Future Sight, Zen Headbutt, all in Dream Balls)
Starly (Jolly nature, Reckless, has Double-Edge)
Swinub (Adamant nature, Snow Cloak/Oblivious, has Icicle Crash and Stealth Rock)
Timburr (Adamant nature, Guts/Sheer Force, has Drain Punch and Mach Punch)
Tyrunt (Jolly nature, Strong Jaw, has Dragon Dance, Fire Fang, Thunder Fang, Poison Fang)
Treecko (Timid nature, Unburden, has Leech Seed, Synthesis, Natural Gift, Worry Seed)
Torchic (Adamant nature, Speed Boost, has Reversal, Counter, Baton Pass, Low Kick)
Venonat (Timid nature, Tinted Lens/Compound Eyes, has Agility, Toxic Spikes, Giga Drain, Baton Pass, all in Moon Balls)
Vullaby (Careful nature, Overcoat, has Foul Play, Knock Off, Mean Look, Steel Wing, all in Luxury Balls)
Zubat (Jolly nature, Infiltrator, has Brave Bird, Defog)
If a Pokeball is not specified, it probably comes in a regular Poke Ball. If a Hidden Ability is specified, all other abilities are available. If the Pokemon has a secondary ability but is not specified, it is available as well.
Currently, I have Dittos in every nature except for Lax and Careful. I can change the nature if desired, but I would want a little more in return. The natures listed are the natures that would be most convenient for me.