The Weegee Doll's feeling lonely. Luigi has Mario, Mr. L has Brobot, that freaky invincible Luigi from another dimension has the giant desaturated murdery Mario, Barney has Elanore if you want to count him, but there's no Mario doll to go with our favorite haunted/cloned plush plumber. So when he finds out that Nintendo's bringing back their Mini Mario toyline for the Mario vs. Donkey Kong remake, he decides to bring one of them to life so he can have a Bro of his own.
Bad News: he gets overzealous with his demonic powers and accidentally brings every Mini Mario in New Donk City to life instead of just one.
Worse News: every single one of them acts like full Crazy Stupid Mode Mario. Pre-Character Development.
Mixed News: There's one of them that seems more-or-less sane and the others eventually come to view him as their leader... but he has the same default megalomania as Weegee used to and wants to take over the world with his Toy Army.