the boss you put down must have a reson, there is a play before put rule and all the nomal rules apply.
the hardest i have faced was tabuu from ssbbawl because he can ko your wrole party and is hard to defeat. i was on nomal differcuite sorry about my spellings
I don't know how hard are the SA-X and the t-rex because i haven't played this games. But generally, the older games were much tougher than the newer ones.
Actually SA-X appeared in metriod fusion. (That one came out in 2004.) I only played on the gameboy though. I don't know what t-rex is from.
Dark Samus from Metroid Prime 3. Her clones attack at the same time when she heals herself.
I actually had little trouble with her. I probably had more getting to the final fight because I kept falling off of the platforms, and I ended up taking too long and getting too much phazon. If you shoot a lot you can kill her in no time.
The Shadow Queen from Paper Mario the Thousand-Year Door. She was hard as hell. So I had to keep on training and training and training and leveling in order to beat her. Then I stocked up on ultra shrooms and jammin jelly and I finally beat her. I had so much relief.
there was a game for the gamecube called Baten Katos, and on this game was a boss named general fadroh. the reason he was so tough was because he had an ability that he liked to play called the orb of annihilation, which made his attacks deal over 1000 damage (as compared to 200 with his regular attacks). my party members tended to have about 2000 health each, so he was able to wipe me out pretty quickly for the longest time. after a month of trying, I gave up completely for about 4 years. one week, I started playing it again, and I beat him with a stroke of pure luck (he never played orb of annihilation) 2 weeks later. that was the hardest boss that I have ever faced to date.
