I registered just to let you know this. The roster is fake. I've heard it mentioned that the character select screen is from SSE. Even if you were to select your character from the start, there is still this little thing to consider:
http://www.smashbros.com/en_uk/gamemode/modea/modea07.html
<quote)Your stock count, or the number of lives you can lose, is set for each stage.
In single-player mode, each time you lose a life, you switch to a different character on your team and are revived as that new character until you run out of stock lives. (You choose the character order for your team members at the start of each stage.)</quote>
You will not be able to select the number of lifes in SSE.