Let's say i use Protect twice in a row. It will normally fail, right? What about if i use Protect, and then, next turn, Detect. Will it fail or not? Because if it doesn't, you could make the ultimate stall strategy, paired with Mean Look.
Yes, it would fail. http://pokemondb.net/pokebase/1046/does-using-protect-and-then-detect-work
Yes it would still have the chance of failing it doesnt reset.