Here's a more clear picture.
HOW IS THIS NOT MATE
I think if there's still enough time on the clock, he can still wait until his teammate takes a piece that he can then use to block the check.
yeah. that's basically what i said...
no shi sherlock, he has two extra pawns on the board cuz it's BUGHOUSE, CAN YOU READ
So in bughouse, I managed to spot a fool's mate that my opponent blundered. I played it, but it was NOT mate due to the fact that they can still drop pieces (bughouse). In that SPECIFIC MOMENT, they had NO EXTRA MATERIALS TO DROP AND YET THE GAME DID NOT END IN MATE. Here is a screenshot post game:
I did cut out a bit of the extra pieces on the left, but you can CLEARLY SEE THAT HE HAS NO EXTRA PIECES. Bughouse NEEDS an update for these situations.
And to top that off, my teammate (600 elo) THREW THEIR GAME ON TIME AGAINST A 100 ELO.