I am taking it you are asking who Mr Game and Watch is, he is
who came before Mario, but he didn't get a name until Super Smash
Bros Melee. His games were on a series of portable consoles called
Game and Watches, which only had one game on each of them, so if
you got the 'Fire Attack' Game and Watch then if you wanted to play
'Manhole' then you would have to get the 'Manhole' Game and Watch.
I think it would be a good idea to google 'Game and Watch' to find
out some more, and if you want to try some Game and Watch games try
to get a 'Game and Watch gallery' game for the Game Boy Color or
Gameboy Advance (Game and Watch Gallery 4 is the best) they have
the original Game and Watch games on them as well as remakes of
them featuring Mario & Co.