Effort ribbon

when it says in the guide you get the ribbon 510 of ur EVs stats r filled but i went there and got those ribbons 4 high lvl pokemon that i havnt Eved.

A pokemon earns EVs in every battle (excluding wifi battles obviously), with or without pokerus/power items, and so, even if you don't battle selected pokemon to select the stats in which you'd like your pokemon to gain EVs, they will still earn EVs across all stats. So, at a high level, after your pokemon have battled many other pokemon, it will reach 510 EVs and you will get the Effort Ribbon. You won't know how many EVs are in each stat though. Hope this helps!

The person who gives you the effort ribbon is in Sunyshore City where they sell the seals.