Then the other team wins by forfeit.
The winning team celebrates.
a perfect game is when a pitcher allows no hits, walks, and his team allows no errors
it can't happen
The game has to be stopped, you need 7 players on a team.
A no hitter means the opposing team didn't get a hit, but still allows for base runners to reach on walks and errors. A perfect game means no one on the opposing team made it on base for any reason. No hits, no walks, no errors.
He or She is replaced by a team mate on the bench.
Restart the game and play it with a different team.
A forfeited game. Assuming the other team shows up with all nine or ten guys.
Yes, and it has been done even in the major leagues. A team can score with walks and errors without getting any hits.
The game won't allow you to sell it.
The game may end in a forfeit; the team who abandoned first may be penalized with the loss of the game.