This is by no means complete.

Attack EVs

Nugget Bridge: 5
Route 25: 3
Drowzee Grunt: 1


SpA EVs

Rival 2: 2
Bridge lass: 1
route 25 lass: 2
Rival 3: 3
4-turn Thrash: 2
Super Nerd 1: 1
Super Nerd 2: 1
Martha: 2
Last fight RT: 1
Rival 4: 3
Haunter: 2
Gastlies: 2
Juggler: 2
Bulba woman: 3
Rival 5: 5
Sabrina: 5
Erika: 3
Rival 6: 5
Agatha: 8
Champion 1: 5

Speed EVs

Up to Brock: 1
Route 3: 2
Mt Moon: Depends (3 if Bug Catcher, 5 if Grunt, 6 if Josh)
Rival 2: 3
Nugget Bridge: 3
Route 25: 2
Route 6: 3
Rival 3: 4
Venonat guy: 1
Mt moon: 4
Gamer: 1
Sign Rocket: 2
Lift Key Rocket: 1
Lavender Rival: 2
Tower Tocket 1: 4
Tower Rocket 3: 5
Tucker: 2
Lt. Surge: 6
Blaine: 3
Rival 5: 3
Giovanni: 2
Rival 6: 3
Agatha: 2
Lance: 2
Champion 1: 3
fire mountain thing grunts: 3
Lorelei grunt: 4
Admin 2 Rocket Hideout: 2