>>23197086>comp versioncompetitive pokemon, meaning good IVs and nature and possibly EV trained
>two of every legendmore than one in case there are different viable sets for that pokemon
>dittosyou got that one right. You'd need one with six IVs, another with all maxed and 0 speed and/or attack, different Hidden Powers spreads
>itemsmostly held items, like choice things, life orb, focus sash and all the battle items, power items to EV train, destiny knot and everstone to breed, all the berries and wings and vitamins in good amounts, evolutionary items, max PPs, rare candies, balls... you get the point
>living dexbasically, a copy of every single pokemon species in the game, meaning that you put them in the game and you instantly get a complete dex: ideally you'd keep them in the bank, and transfer it to new game to insta-complete the dex with all its benefits. otherwise it just takes up box space and is a drag to transfer to other games without bank
if you don't know what IVs and EVs are, you sould look into that, asking it here may produce some bad attitude towards you