Mario Day is right around the corner on March 10, and while we're still waiting for most of the official deals to go live, there are a bunch of great discounts to peruse ahead of the event. Whether you're in the market for a new Switch game, a Lego Mario expansion set, or a snuggly plush, there's a bunch of Mario gear on sale ahead of the plumber's big day. One cool deal for longtime fans is for the Super Mario Encyclopedia, which is filled with 256 pages of Mario knowledge and is now just...