No.
You do not need to download Super Smash Bros. Brawl, it is on a disc that you can buy at a game store such as GameStop or Best Buy.
There is no update for Super Smash Bros. Brawl and there never will be. Not true. If you're talking about Brawl+, you need the Homebrew Channel, and then you need to go to the official Brawl+ site.
depends
You can but you need a cheating device.
No the Gamecube Controller is not needed for Super Smash Bros Wii U although there will be a bundle with the game and controller coming out.
There is no Fire Emblem stage in Super Smash Bros Melee. Hyrule Temple has Fire Emblem background music, but it does not need to be unlocked.
wiki is bad
i need more information than that
He is a starter character, therefor he does not need to be unlocked.
I think you need something called Action replay.
That depends...who have you unlocked? (Or who do you need)
only if you want to play online