Incredibly enough, just one with the two move mate for Black.
Game 5229133
Troppo - greenpawn34 RHP, July 2008. (see below).
My opponent, a 1400 player, said he just got mixed up playing so
many openings at once. I can relate to that because I've done it.
There may be others but there are thousands of games (approx 100,000)
timed out under 6 moves. In an effort to clean up my DB I may have binned
a few though I did scan for mates and saved hundreds of Scholar Mates.
This sort of thing in it's various forms.
Some players as White may have played 1.f3 2.g4 and resigned before
Black got a chance to mate. The pgn just registers 1-0, 0-1, or ½-½
and does not reveal if it's a resignation or a time out.
As I said before, 99% of the wins under 6 moves are time outs.
I do not have the time or inclination to open each game and see
if the game was timed out or resigned.