Sturdy has the Gen V and later description. In Gens III & IV, Sturdy only protects against one-hit KO moves like Guillotine. In Gen V+, it also protects against being KO'd at full HP. The image below is of a Pokemon in Platinum, so this description is wrong. IDK how worth it it would be to have separate descriptions for earlier Gens, but seeing this description on here might confuse someone, so I thought I would mention it.
Sturdy has the Gen V and later description. In Gens III & IV, Sturdy only protects against one-hit KO moves like Guillotine. In Gen V+, it also protects against being KO'd at full HP. The image below is of a Pokemon in Platinum, so this description is wrong. IDK how worth it it would be to have separate descriptions for earlier Gens, but seeing this description on here might confuse someone, so I thought I would mention it.