No.
+4x2 =/= x10
Fuck. Nevermind. It does. But only if you would only normally gain 1 EV, it wont work for 3 Evs.
You're right, on the usual situation (killing Andrew's Magikarps) it'll work that way. Otherwise...
. Let's suppose you killed a Magikarp with Pokerus and your pokemon is holding the Speed power item (I forgot the name).
1*2 + 4*2 = 10
. Supposing you killed a Staravia
2*2 + 4*2 = 12
. Supposing you killed a Raichu
3*2 + 4*2 = 14
. Supposing you killed a Gastly holding the Speed power item
1Sp.Atk*2 + 4Spd*2 = 2Sp.Atk + 8 Spd
. Supposing you killed a Gyarados holding the Speed power item
2Atk*2 + 4*Spd = 4Atk + 8 Spd
So, this is how it works.
Btw, I have 2 questions:
Is the Psypoke Damage calc reliable?
We have more than 100 pages again, time to a Mark 3?