So does anyone notice if Smash Bros 3ds file is similar to Brawl ?
*giggles* Sorry, couldn't help myself...
In all seriousness, no, SSB43DS is not even close to being anything like Brawl. First of all, they are on 2 totally different consoles (not to mention one is a handheld), with 2 totally different formats, and 2 totally different games.
If we were able to hack Smash4, than this wouldn't be called Brawl Vault anymore. Trust me, if it was possible, there would be people pissing their pants, foaming from the mouth, and possibly spontaneously combusting.
And before you say anything, no, it Isn't possible to do it with the Wii U version either.
(I'm not trying to be rude, just direct and to the point)