From Worlds Collide Wiki - Final Fantasy VI Randomizer

There are a total of 492 shop slots containing 13 tools, 91 weapons, 45 armors, 15 shields, 57 helmets, 85 relics, and 186 items. Items are split by type and divided into tiers D through S. Each shop slot randomly selects a tier of the same type using corresponding weights and a random item from the chosen tier is selected using a uniform distribution.

As an example,
6.8% of the 91 weapons will be randomly selected from tier A using a uniform distribution. Therefore, each seed will contain an average of 0.068 * 91 = 6.188 tier A weapons and each weapon in tier A will have a 6.8 / 6 = 1.13 percent chance of being in each shop weapon slot.

Tier D C B A S
Weight 0 0.7 0.3 0 0
Size 0 5 3 0 0
Avg. Per Game 0 9.1 3.9 0 0
AutoCrossbow Air Anchor
Bio Blaster Chain Saw
Debilitator Drill
Tier D C B A S
Weight 0.25 0.4 0.28 0.068 0.002
Size 27 34 19 6 4
Avg. Per Game 22.75 36.4 25.48 6.188 0.18
Air Lancet Atma Weapon Assassin Aura Lance Fixed Dice
Ashura Aura Doom Darts Enhancer Illumina
Blossom Blizzard Excalibur Magus Rod Ragnarok
Cards Bone Club Fire Rod Pearl Lance ValiantKnife
Chocobo Brsh Boomerang Graedus Pearl Rod
DaVinci Brsh Break Blade Hawk Eye Sniper
Darts Crystal Ice Rod
Dirk Dice Imp Halberd
Epee Dragon Claw Man Eater
Forged Drainer Scimitar
Hardened Falchion Sky Render
Imperial Fire Knuckle Striker
Kaiser Flail Stunner
Kodachi Flame Sabre SwordBreaker
Kotetsu Full Moon Tack Star
MetalKnuckle Gold Lance Tempest
Mithril Claw Gravity Rod Thunder Rod
Mithril Pike Guardian Tiger Fangs
Mithril Rod Heal Rod Wing Edge
MithrilBlade Magical Brsh
MithrilKnife Morning Star
Murasame Ninja Star
Poison Claw Ogre Nix
RegalCutlass Partisan
Shuriken Poison Rod
Stout Spear Punisher
Trident Rainbow Brsh
Rising Sun
Rune Edge
Soul Sabre
Tier D C B A S
Weight 0.2 0.42 0.3 0.078 0.002
Size 10 9 6 4 2
Avg. Per Game 9.0 18.9 13.5 3.51 0.09
Cotton Robe Chocobo Suit Czarina Gown BehemothSuit Minerva
Gold Armor Crystal Mail Imp's Armor Force Armor Snow Muffler
Iron Armor Dark Gear Mirage Vest Genji Armor
Kung Fu Suit Diamond Vest Moogle Suit Nutkin Suit
LeatherArmor DiamondArmor Red Jacket
Mithril Mail Gaia Gear Tao Robe
Mithril Vest Light Robe
Ninja Gear Tabby Suit
Power Sash White Dress
Silk Robe
Tier D C B A S
Weight 0.35 0.33 0.17 0.149 0.001
Size 4 2 2 5 1
Avg. Per Game 5.25 4.95 2.55 2.235 0.015
Buckler Crystal Shld Force Shld Aegis Shld Paladin Shld
Gold Shld Diamond Shld TortoiseShld Flame Shld
Heavy Shld Genji Shld
Mithril Shld Ice Shld
Thunder Shld
Tier D C B A S
Weight 0.25 0.52 0.2 0.03 0
Size 9 12 4 2 0
Avg. Per Game 14.25 29.64 11.4 1.71 0
Bandana Bard's Hat Circlet Cat Hood
Gold Helmet Beret Mystery Veil Genji Helmet
Hair Band Coronet Oath Veil
Head Band Crystal Helm Red Cap
Iron Helmet Dark Hood
Leather Hat Diamond Helm
Mithril Helm Green Beret
Plumed Hat Magus Hat
Tiger Mask Regal Crown
Tier D C B A S
Weight 0.15 0.4 0.35 0.096 0.004
Size 13 19 11 7 5
Avg. Per Game 12.75 34.0 29.749 8.16 0.34
Barrier Ring Amulet Atlas Armlet Dragon Horn Economizer
Cure Ring Back Guard Blizzard Orb Genji Glove Exp. Egg
Czarina Ring Beads Charm Bangle Hero Ring Gem Box
Fairy Ring Black Belt DragoonBoots Merit Award Marvel Shoes
Goggles Cherub Down Earrings Moogle Charm Offering
Jewel Ring Coin Toss Gold Hairpin Muscle Belt
MithrilGlove Crystal Orb Memento Ring Ribbon
Relic Ring Cursed Ring Pod Bracelet
Sneak Ring FakeMustache Rage Ring
Sniper Sight Gale Hairpin Safety Bit
Sprint Shoes Gauntlet Wall Ring
Star Pendant Guard Ring
Tintinabar Hyper Wrist
Peace Ring
Thief Glove
True Knight
White Cape
Zephyr Cape
Tier D C B A S
Weight 0.65 0.3 0.03 0.016 0.004
Size 16 7 2 2 2
Avg. Per Game 120.9 55.8 5.58 2.976 0.744
Antidote Ether X-Ether Dried Meat Megalixir
Bolt Edge Fenix Down X-Potion Elixir Super Ball
Echo Screen Remedy
Eyedrop Sleeping Bag
Fire Skean Smoke Bomb
Green Cherry Tent
Inviz Edge Warp Stone
Rename Card
Shadow Edge
Water Edge