how to break things

How to Break a pokemon without a mega stone or changing its base stats
Step 1: give Deoxys a HA that changes with Forme.
Step 2: Make those HA as follows:
- Normal: Contrary
- Attack: Pure Power
- Defense: Filter
- Speed: Speed Boost
Step 3: Give them the following moves:
- Normal: Psycho Boost, Close Combat, Moonblast, and Dark Pulse
- Attack: Belly Drum, Zen Headbutt, Drain Punch, Play Rough
- Defense: Safeguard, King's Shield, Counter, and Mirror Coat
- Speed: Psychic, Electro Ball, U Turn, and Extremespeed
Step 4: Equip the following items:
- Normal: King's Rock
- Attack: Expert Belt
- Defense: Leftovers
- Speed: Choice Scarf
Step 5: Drool at the OP