Can Pokemon Stats Go Up or Down if they are lvl. 100?

Question

Like is there any way to reduce Pokemon stats or increase them if they are already lvl. 100?

Comments

I Read This as Can Pokémon go up stairs when they're lvl. 100 0_o

Answer 1

You can give them certain berries that increase their love for you but reduces certain stats. You can reset your EV's doing this.

Answer 2

If you haven't already maxed out your Pokemon, try getting some calcium, protein, carbos, etc. to maximize speed, attack, defense, special defense, special attack, and even raise your health points.