Don't worry, this is the LAST TIME we have to fight Lord Crump in a robot or not! Really. =) Anyway he's still a really annoying customer and he's all the stronger in Magnus 2.0. And yes if you have Goombella handy you can see he has 70 HP, 7 attack and 2 defense. That's pretty strong AND he'll use his damned rocket fists as separate enemies as well that's not exactly a picnic. So that makes you faced with three enemies a majority of the time. I used Mario and Vivian for a majority of this battle anyway. Okay so Crump will use those X-Punches. Use Fiery Jinx immediately to wipe those out and then have Mario do Multibounce if you failed that. Shouldn't be
too hard. If you get an opportunity and have lots to spare Art Attack would be a great ability to use although it'll do far more damage against only Crump. He'll also use Magnus to stomp you but that will only do 6-7 damage not exactly that much anymore.
Alright now be VERY careful when Magnus reachs 30 HP. Make sure Mario has at least 25 HP remaining when Magnus goes to 30 HP because then he'll get all of the audience out put them inside his system and through the entire lot of them at you! Yeah that's a VERY deadly attacks hitting many times for 3 damage apiece. Try and block the attacks as best as possible because that's really nasty. If you do survive, use an Ultra Shroom and then use Power Bounce and a strong partner like Vivian Yoshi or Bobbery for the rest of the fight. Once you get past that mark it's an easy battle.