Pinball, contrary to what the box and cartridge label would have you believe, is not a Mario game.
Present at offset 0x17A:
BY S.MATSUOKA & S.IWATA
unused graphics and other cruft
The bonus game (featuring a pancake-prone Pauline) has rollovers with numbers "1", "2", and "3". Graphics exist for a rollover with the number "4", using the top-right tile from the "1" rollover.
A little 8×8 ball graphic in the background tiles. May have been used for showing the ball count instead of the text "BALL".