In addition to Sturdy's previous effect, Sturdy now works like a Focus Sash, causing the Pokémon to have 1 HP remaining if another Pokémon's attack or confusion damage would have brought it from full health to 0 HP. Sturdy will activate as long as a Pokémon has full HP before the attack, and therefore it can activate multiple times if the Pokémon is brought back to full health, or if the Pokémon has a maximum of 1 HP.
If a Pokémon with Sturdy is holding a Focus Sash, Sturdy will activate first. A Pokémon with Mold Breaker will ignore Sturdy. When a multi-strike move hits a Pokémon with Sturdy, Sturdy's effect can only activate for hits while the user has full HP. Destiny Bond and Perish Song will not cause Sturdy to activate.
If the Pokémon's HP is full, no matter how much damage it takes, it will be left with 1 HP.* If the Pokémon's HP is full, it will be left with 1 HP when it takes damage that would normally make it faint! It also protects the Pokémon from one-hit KO moves like Fissure!*
When Roggenrola is hit with a powerful attack, it doesn't get hurt much from it. Also, when Roggenrola is hit with a one-hit knockout move, it stays in its place and does nothing. The move is then canceled on the spot.