MegaMan NT Warrior S03 E35 Queen Fight!

At a convention center, a Ms. Tiara contest is held with a chance for girls to win a golden tiara, and many girls from DenTech City enter. A rivalry quickly builds between Maddy and Tesla. Tesla attempts to steal the tiara, so Charlie appears to intervene, and all of the girls aid Lan in Neo WWW's defeat. Ms. Mari ultimately wins the contest, and both Charlie and Tesla receive Crests of Duo.