How will maxing out my Pokemon's IV's affect my Pokemon? (US/UM)?

Question

I know I can maximize my Pokemon's IVs with a gold bottle cap, (aka Hyper Training) but won't that affect my Pokemons characteristic? Does this mean it loses its individuality? Doesn't this also affect its Hidden Power? Also, does that mean its more powerful, or helpful? What are the pros/cons of maximizing your Pokemon's IVs? Just curious.

Answer 1

Hyper training only affects its stats on its summary screen and in battle. It does not change the Pokémon’s characteristic, HP type, and is even ignored when passing down IVs for breeding.

Answer 2

The bottlecap gives it the stats it WOULD HAVE if its IVs were all maxed, but doesn't actually change those IVs.