Hatcheck Girl

The unnamed Hat Check Girl works as the hat check worker at the Boom Boom Bar, who took Mario and Luigi's tool belts from them for safekeeping while they were on the dance floor. 
Upon taking the tool belts from Mario and Luigi, she notices their wanted poster in the hat check room. She was shortly after on the phone with someone to alert them of the brother's presence in the Boom Boom Bar. Lena and a group of Goombas arrived to retrieve the meteorite piece and arrest Mario, Luigi, Spike and Iggy. Big Bertha knocked out the Hat Check Girl with a punch and hid in her hat check room with Mario and Luigi, and assisted them in their escape by instructing them to take the Thwomp Stompers in the room.
== Source ==
* https://www.mariowiki.com/Hat_Check_Girl