Finally thought of one.
Pikmin 2 - The Final Boss
You go through the entire game learning what hurts you and your pikmin whether it's enemies or the environment or the elements. The only element that does NOT hurt or stun the captains in anyway whatsoever is poison.
Poison stuns the captains like any other element would (without resistance upgrades) in only this one instance in the entire game.
10/10
Pikmin 2 - The Final Boss
You go through the entire game learning what hurts you and your pikmin whether it's enemies or the environment or the elements. The only element that does NOT hurt or stun the captains in anyway whatsoever is poison.
Poison stuns the captains like any other element would (without resistance upgrades) in only this one instance in the entire game.
10/10