Riku and Mickey were fighting Larxene in a match set on Station Plaza in Twilight Town. Mickey was knocked back by a knife attack from Larxene.
"End of the line, rodent!" Larxene snarled.
She charged her knives with dangerous amounts of electricity, before dashing at the duo. Riku looked to the side and saw an Assist Trophy capsule. The capsule looked just like the Assist Trophy capsules that Smash Bros. used, except there was a logo of an "M" on the cover instead of a silhouette.
"Not yet, it isn't!" Riku shouted.
He grabbed it and activated it. He was hoping that it would give him someone useful, such as maybe one of the Sin Kids/2nd Generation Children (he preferred Lupa or Lacy) some of Dank Lord Ganondorf's spare memes, or Morgan because of his high magic damage infliction rate, but his Assist ended up turning out to be Xolette.
"SLOW!" Xolette yelled.
Larxene's speed decreased drastically, to the point that it was as if she was only walking.
"Yeah!" Riku cheered
He and Mickey proceeded to dual attack Larxene with their Keyblades and land as many hits on her as they could. By the time the spell ended, most of her health was depleted, to the point that only a few strikes would finish her off. Xolette looked at Riku and Mickey.
"Gosh, thanks for the assist, Xolette." Mickey said.
Xolette scoffed before charging a Darkaga ball in her hand.
"Xolette? What are you doing?" Riku asked.
He was blasted by the girl before he could realize what had happened. The attack knocked him onto his back, halving his health. Xolette then effortlessly blocked an attack from Mickey with Soul Eater, before completely KO'ing him with a Double Dark Beam.
"I didn't come here to help you, Riku, Mickey." Xolette said.
She turned her attention to Larxene.
"I came to show these fighters my power!" Xolette sneered.
Larxene pointed her knives at Xolette.
"Big talk, coming from a flea bag! Alright, little rat, let's see what you've got!" Larxene sneered.
She rushed at the younger Nobody girl.
"Stopga!" Xolette shouted.
Larxene stopped in her tracks, allowing Xolette to get behind her and slash her head with Soul Eater. The spell ended and Larxene winced in pain as she held her head, feeling how depleted her health was.
"Ow! Okay, you've got some good moves." Larxene growled.
Riku shook his head as he watched the two females.
"Well, Xolette... you sure like making enemies." Riku said.