I eman it shoudl be since it is impossible too kill, and it had safety gogglees :/
Shedinja can still be killed by Burn, Confusion, Poison, Sandstorm damage, Hail Damage, Destiny Bond, Perish Song, Aftermath Damage, Leech Seed, and Mold Breaker Pokemon.
Hope I Helped!
Skill Swap will always fail if the user or target has Wonder Guard. However, it is still possible to get Sturdy on Shedinja with a pretty complex strategy. Lead with a Pokémon that knows Entrainment and a Pokémon with Sturdy and Mimic, use Entrainment, use Mimic on your Entrainment Pokémon (so that you have a Sturdy Pokémon that knows Entrainment), switch the non-Sturdy Pokémon to Shedinja and use Entrainment on it. This is generally a bad strategy since it gives your opponent two turns to take out your Pokémon and doesn't make Shedinja fully invincible; it can still be KO'd by any indirect damage (status, weather, Leech Seed, etc.) or a Pokémon with Mold Breaker.
Definitely not. Not only is it difficult and risky to set up, Shedinja is easily killed by status conditions. Since it has 1 HP, any status damage makes it faint in one shot. Shedinja with sturdy is used way less than you’d think. It’s just not reliable.