Why do most team builders have their EVs add up to 508 instead of 510, I heard something about dividing by four. Please elaborate
510 is the maximum amount of EVs a Pokemon can have. However, since 4 EVs = 1 stat point, and 510/4 gives a remainder of 2, and 2 EVs doesn't do anything, 508 are all the EVs you need to get the maximum benefit of all 510 EVs.