Iccurus City: Stunfisk- 2 HP
Route 1 Water: Basculin- 2 Speed
Celestial Tower: Litwik- 1 SAtk
No Pokemon gives off 4 HP EVs. The Power Items add 4 EVs to the current amount of EVs the defeated wild Poke gives. So if a Litwik gives off 1 EV, add 4 EVs to that and it gives 5.