For EV'ing two spreads, you get 2 credits. About the redis rights, I usually only do it like - you get semi redis on one of my Pokémon , I get on one of yours. Technically, you keeping 2 credits is only for EV'ing and doesn't get you a copy of the Pokémon. If you'd like it semi-redis, you give me semi-redis rights on one of your Pokémon.