Mario ×99

Mario x99 is a transformation that appears in chapter 6 of Super Mario-kun volume 4.

While fighting the last remaining Reznor, Mario is launched straight into the Blue Switch Palace, where he collects a bunch of Grey Coins from the transformed Spinies. The Reznor reaches him and yells at Mario to get out and fight. Mario, having obtained 99 lives from the coins, comes out, followed by 99 copies of himself that starts beating the Reznor up, winning the fight. After that, Luigi and Yoshi find the real Mario, baiting him with a coin.