If you could add one Song to brawl....

[Triforceman22]

what would it be?

I would add "The devoted" to the fire emblem list.

and...GO!

[SkyMyl]

Think about this: The Ganondorf Battle from Twilight Princess. That would be epic.

[Avion-Finch]

The true mirror(normal version) from the first Baten Kaitos.

[Tupin]

Any of Kapp'n's songs.  :D

Remixed, of course.

[jnfs2014]

The SuperMarioGalaxy theme.

[Zora Link]

Pokemon Kanto Gym Battle from G/S

[Shujinco2]

Spring Yard Zone - Sonic 1

[Triforce_Luigi]

Only one? Hrm... That's a hard decision...

I think I would add the SMG theme...

[Java]

Tomorrow Hill (WarioWare: Smooth Moves)

It would fit in perfectly with the rest of the songs.

[Eizweir]

An instrumental of TtFaF for Final Destination

[The_Waddle_Dee_Knight]

Beware the Forest's Mushrooms, AKA Forest Maze from Super Mario RPG. :P

Super Mario RPG
It is the only one just for me
When I play the game, I get lost in a phase
Then, I find out, I'm stuckin, Geno's maze

Ya, I think that's how it goes. XD

[King_Gamer28]

Mr. L's theme would be pretty neat as a song for Mushroomy Kingdom ;).

[DededeCloneChris]

The Whoa Zone music.

[Qsmash]

The final battle against Dimento in Super Paper Mario.

[farf]

This godless endeavor would be so cool!