I assumed you were supposed to say "bro's". Like, were they running out of space on the box that they needed to abbreviate the name of the game ?
Anyway, in France we pronounce it "Mario Bross" because nobody knows bros is short for brothers (and even fewer would care even if they did), people just read the letters as they see them.
Anyway, in France we pronounce it "Mario Bross" because nobody knows bros is short for brothers (and even fewer would care even if they did), people just read the letters as they see them.