Oh god, there's too much going on here. With the psychic attacks tossing Carnivine aside and throwing Butch off course, and Yuume falling onto the controls, it's cut Cassidy off from everyone else. Just when he thinks he can tackle her to end this, the mech starts moving on its own! Sena "hiees" and starts running again, moving to tackle Cassidy anyway - it won't do much good at this point, but at least she'll be out of the way.

"Hiegh..." Sena's managed to successfully disable her, but... "What to do now, against this kinda thing..."

"What're you doing, kid?" a voice comes from his Rotomdex, who isn't the peppy Suzuna-like voice he's used to. "We gave you some new toys - use 'em or lose 'em!"

"New...huh? Oh!" Sena pulls out a Dynamax Ball, one of the new tools they'd been given to try. "This could change everything, to go up against a mech like that...Monta! Return!"

Sena manages to somehow hit Monta with the beam coming from the ball despite the distance between them, before the ball expands in his hands.

"W-whoa! Wait, wait, wait!"

He clumsily shoves it above his head, stumbling in place for several seconds before he can find his footing. His legs are shaking from even holding it up.

"Ghhh-! Monta! Go all out - Devil Backfire!"

Sena wheezes, then throws the ball clumsily. Monta's appearance from the ball, however, is anything but - he leaps forward, growing in size as he coats himself in blue fire for a Dynamaxed Flare Blitz. Powered up by the sun, it manages to push the mecha back, before Monta slides into the second part of the Devil Backfire combo: Close Combat.

It's several powerful blows one after the other, and while they don't topple the mecha over, they sure are providing openings for other characters to chip in.