[quote name='evergoo']Also, the only CAG I'm aware of that has unlocked everything is JoeB (based on his Backloggery).[/QUOTE]
I have to believe more CAG's have completed this game to a 100% level, as I have and I am consistently on the lowest tier of CAG's in the brawl tourneys. I managed to get all 128 challenges complete without the use of a single hammer, but I got hung up on the Boss Battle Intense run for a very, very long time as I could only use my main, Samus, for the run (I've heard Charizard is the way to go, but I couldn't pull it off). When I finally beat it, I stared at the TV in disbelief for at least a minute. I did cheat and use a turbo GC controller rubber-banded down to farm for the last 3 stickers of the lot of 700, but I was able to beat all events (solo/event) on intense, along with a 100% SSE run on intense. If I can do this, I know all the other CAG's I've played online surely have the skills to do it.
I figure it's just got to be the time commitment and the lack of a centralized/integrated Nintendo achievement/trophy system. I know there are people here who hate achievements and trophies, but I really wish Nintendo would implement an integrated system into their next console for all its games, as I love the defined meta-game challenge of them. /end rant