>>33531770I'd say that a Pokemon that keeps standing thanks to Sturdy is more or less out of the fight. The ability just keeps them standing but doesn't mean they could keep going. So, yeah they'd be feeling it much worse than the a normal KO- I bet they'd love to feel that actually, not having to withstand so much pain before fainting.
For 1-hits, I'd say it'd be a disaster- they'd feel the worst effects. Sheer Cold, for example, I'd say would give them frostbite if one doesn't hurry and recall them before the move is over.
Also, whilst doing research for DS and Barred Hearts, I found out that apparently, Sneasel and Mawile are born being straight bantz masters.