This is so weird. I've beaten Boss Battles on Intense in Brawl (multiple times), and it was nothing like this.
The sad thing is, I've played these battles so many times tonight that I do know each boss's attack and the telltale signs. I just... have no way of dodging. You have to be so perfect so many times. You need to be able to do like six air dodges in a row or have frame perfect reflexes with spot dodges, etc. Nothing else in the entire game (including all of WoL on hard mode leading up to this) asks anywhere near this level of precision and expertise to clear it. I genuinely feel like I'm equipping 1- and 2-star spirits for these boss fights even though I swear I'm using my most powerful legendaries. I'm surprised I don't see anyone else talking about what a monumental difficulty spike this is--I've never seen anything like it in my 30-odd years of playing video games. But then again, maybe I'm one of the very few fool enough to insist on beating Adventure Mode 100% on hard.
Another thing I've noticed is that no matter who I use (even Ganondorf and Donkey Kong), I do so LITTLE damage to Galeem and Dharkon. It allows the battle to just drag on foreeeeeever, and thus gives them more times to use uber powerful attacks that take me from 10%-100% and eventually KO me. I've never gotten either boss down to less than a quarter of health before. Even in the final battle, I can defeat one, but the other one is just so hard. I can't get it past the point where it only has one-fourth HP left. And that's with THREE friggin' stocks!
I think I have to stop now. I have reached the limit of where my skill can take me in this game. I was hoping that I could beat this one 100%, but I can't. I give up.
FINALLY! I finally beat Galeem!
Ok so I used Ness.
Soma Cruz (no style applied).
Peach (Wedding)
Fox Luigi.
Battle Notes-
ABSORB- Ness can absorb the fireballs, and the attack will damage Galeem a little bit if he touches you too.
•Get Galeems health to just before he sends the yellow energy waves, and get him to give you one last fireball attack so you can absorb it and be at 0% for the next part of the fight.
•Oh I also tried to get Galeem to send out a couple more attacks before I sent him into the rage mode in hopes that there was a specific order that he does the attacks and he would use the fireball attack right when I need to heal the most!
ANTICIPATE- I made an effort to charge up my side-smash attack BEFORE Galeem goes limp in the middle of the stage. I was able to get 3 fully charged hits on him.
(If you have the smash attacks heal skill, that little bit will help too. I would charge up-smash/ or side-smash if I was facing away from Galeem when he was down. The yo-yo doesn't do to much damage and healing but every little bit helps when you are healing!)
HOMING SPIRIT BOMB THING- I would try to devert it away from the stage and up. If I happened to get hit with by it, I would dodge out of it while the explosion is happening, instead of just taking the whole attack.
EYEBALLS- (This had me wanting to give up too man) I told myself not to panic when this attack happens, focus on the order that they appear and be ready to roll.
•So when I beat him I happened to be near the middle of the stage and not on a platform. I feel like that helped me roll into the wave and let it pass me.
•I would usually get hit and sent flying then just try to stay away while the other waves lose power and don't hurt at the very end of the attack. So I guess that can be Plan-B.
It still took me a few tries and I even got Galeem's health down to passed his name before I fell because I thought I could use B-up twice since I was getting damaged by the yellow waves. Don't give up, and let me know how it goes.
OH and I do have the additional mid-air jump skill applied!