The Friend Roster is your list of Friends of Super Smash Bros. Brawl. To register your friends, you must enter their 12-digit Friend Code. When both people enter each other's Friend Code, they will be able to see each other's profile. You will only be able to register 64 friends.
To the left of the profile, a player will be able to put a picture or logo of a character that they currently have unlocked, a boss or enemy they have beaten, or a Mii. Above the picture, a player will be able to put up their name, which will show up in-game when they are playing with Friends and they are not using another name chosen on the character select screen.
In the upper-right corner, a circle will appear after a game is played between the two players. The circle shows how clear the connection was between the two players. From worst to best, the colors are Red, Orange, Yellow, Green, and Blue.
On the very bottom, a player can leave text, as to leave a message, or to chat between friends. If one selects their own profile, they will be able to write text that will show up when they taunt. There can be four different texts (one for each direction on the D-pad).
The profile will also display whether a friend is Brawling with anyone (shown by "Brawling"), Brawling with anyone on a Team (shown by "In Team Battle"), Brawling with a friend (shown also by Brawling), Online, or offline.