Everyone seems to be giving this a high score just because it's Brawl-related. Being a Flash author I have to rate the Flash for what it is and what it is ain't much... It's a gradient effect background with some text and no sound effects other than the music that doesn't loop.
I know it's pretty hypocritical of me to rate this poorly when I've made my own video game quiz of even lower quality, but I was a n00b back then, as we all were once. Looking back on it now I'd probably rate mine even lower than this one.
Anyway, most of the questions were pretty good, but some were kind of unclear. Like the differences between Link and Toon Link... what do you qualify as differences? Are you counting their looks/name or just their moveset? Also, some of the questions were WRONG. Donkey Kong wasn't announced on the 27th, check it yourself... Infact, NO character was announced on the 27th... that update was the Banana Peel... And Brawl came out in Japan on January 31st, not the 1st. I noticed 31st was an option so I'm guessing that was just a mix-up in coding.
I quickly looked at the first one and there's not much improvement here other than difficulty levels. My point is, try polishing up your Flashes a little before submitting, I've made the same mistakes as you so I know...
In conclusion, it's of really poor quality, but it's a good start for your coding skills and I'd like to see a cleaned-up version of this... sorry if I came off as an ass, just trying to help! <:)