How does the EV system operates with boosters? [ORAS hordes]?

Question

EV training my Xerneas for the "Enter the Dragon Type" competition.
I need 252 Special Attack EVs. I only have Power Lens as a booster for 4 more points in special attack.
Say I went to route 113 with a Oddish in my team to mass beat hordes.
What is the equation of given Special attack points?
Does it follow:

1. Oddish Fainted gives 1 SpA point; Power Lens increases every individual's given points for a total of 25 EVs in special attack for a horde of 5 Oddish fainted?
2. Or Oddish Fainted gives 1 SpA point; the horde gives out 5 points for a total of 9 EVs for a horde of 5 oddish fainted?

No Pokerus, no Macho Brace

Comments

This is article has a little section at the eginning that talks about this: http://nuggetbridge.com/articles/ev-training-horde-hotspots-pokemon-omega-ruby-alpha-sapphire/

Answer 1

It's the first scenario that you listed. Power items applies to each Pokemon defeated in a horde.

Just for the heck of it, here's the maths (again):
>Oddish gives 1 Sp. Atk EV, 5 Oddish mean 5 sp. atk EVs.
1 EV + 4 (boost from Power Lens) = 5 EVs
5 EVs x 5 (horde battle) = 25

That's 25 EVs per horde battle, with just the power item and no Pokerus.

Reddit thread on EV training w/ hordes

Comments

Thank you.