-rips out hair-

[Kyle]

I HATE BOSS BATTLES.
Do they REALLY expect us to beat Boss Battles on INTENSE??!!?? Im having trouble with hard...
Ok, its either Tabuu beats me with his godly powers or I mess up. Like facing Meta Ridley, I fell through the ship when it was knocked down for a split second...
Then Master Hand catches me off guard and I slip up by an inch and miss the edge as Toon Link.
Ughh.. Tips Pl0x?

 

[Micah]

The two 'hands' are the easiest part for me. I was just about to beat it as Wario, battling Tabuu, and my GCN controller was messing up. Wario wouldn't jump! I was very angry.

 

[SL92]

My only tip is to use Pit for boss battles, his back air is great for them. Plus he can fly.

 

[JJH]

This may be obvious, and doesn't work for some bosses, but I find that for the most part, for flying bosses stay on the ground as much as possible, and for non-flying bosses stay in the air as much as possible.

Also, for stadiums where you can fall off the edge, use someone like Pit who can fly/has good recovery. For stadiums where the ground goes off to both sides, use a slightly heavier character.

Of course, both of those things will depend on who you normally use and how you normally fight. But it sometimes helps.