Only 2 lives it's impossible, I can't do it D:< It's too hard, I can survive to the beast and the man that stands in the stage, but when I have to battle with the swords, I have like 60%+ and one life. Any tips? D:
Seems like it's impossible but some people manage to get the job done. Hell Master Core can be a B.... but there's a trick to beating him...well I call it a trick. I use jigglypuff and i just attack while i'm in the air and halfway off the stage so he won't be able to reach me. =P And the shield is gonna be a great usage. the swords can also be attack from above so try and learn the sword pattern so you know when to just shield and avoid all of the chaos. =P
ROB helped a lot for me as he has a really good recovery and his laser does multiple hits on most forms
also if you use the top on the beast form it just bounces on top of it
for the sword form whenever he was charging for the multi hit thing I ran behind it and jumped out stage so I wasn't in reach of it.
The biggest threat for me was fighting the shadow clone of ROB as I had 100%+ and 1 stock left..
I spammed the heck out of the top and the laser and somehow came through
Customization will probably help a lot (though I always forget this is even a thing, thus, I haven't used them)
The real 'key' though is learning all his different forms attacks and dodging. It took me a few tries to finally defeat him at top difficulty as I learnt his moves, but I managed to defeat him with no deaths with Kirby the first time I actually defeated him.
There's a tricky and long but extremely effective technique. Start playing Melee, and get good at Melee. Wavedashing, high speed tilts, the like. Then pick up Sm4sh 3DS and pick a heavy character that you played as in Melee. You'll do a-okay.