Ok I remember almost everything he said in the video so I'm just gonna do this again.
No Feebas allowed for Gen 3 and 4 because if you know what tiles they are it's a 50% chance to find one, sooooo.
Red: Golduck, 1%, Seafoam Islands, 1F
Blue: Slowbro, 1%, Seafoam Islands, 1F
Yellow: Dodrio, 1%, Route 17
GSC: Dunsparce, 1%, Dark Cave, Violet City side
RSE has a tie:
Wailord, 1%, Route 129, Surfing
Magneton, 1%, New Mauville
Illumise, 1%, Route 117, Only in S
Volbeat, 1%, Route 117, Only in R and E
FRLG: Dragonair, 1%, Safari Zone, Fishing, Super Rod
DPPt: Munchlax, 1%, 4/21 Honey Trees, you know the deal.
HGSS: Dragonair, 3%, Dragon's Den, Fishing, Super Rod
BW: Cryoganal, 1%, Twist Mountain
B2: Medicham, Lombre, Granbull, Murkrow, 1%, Hidden Grottoes
W2: Hariyama, Lombre, Granbull, Murkrow, 1%, Hidden Grottoes
XY: Abomasnow, 1%, Route 17
ORAS: Ralts, 4%, Route 102, and Volbeat (OR) or Illumise, (AS) 4%, Route 117
SMUSUM: Kangaskhan, 1%, Wela Volcano Park, or Bagon, 1%, Route 3
LGPE: Non Static Legendary Birds, <1%, any Route, High catch combo
SwSh is a mess because of weather, Overworld encounters, hidden encounters, strong spawns, etc.
Sword: Deino, Hakamo-o, and Turtonator, 1%, Lake of Outrage, Raining, Thunder, and Intense Sun, respectively
Shield: Goomy, Sliggoo, Drampa, 1%, Lake of Outrage, Raining, Thunder, and Thunder respectively
Thank you guys for dealing with my total BS on this thread and the other one.