Most people who think Jigglypuff is useless haven't explored SSBM or SSB. I used to think so but I got my ass handed to me on a silver platter by someone who rested on my Kirby... Jigglypuff is still pretty powerful but his killer attack has a HUGE lag after it. Its time to wake up is equivalent to the time taken for the opponent to respawn after being killed. (3 seconds)
Every time someone mentions Cloud, Sephiroth or Master Chief has their IQ dropped by ten. Why? Coz these chars are not Nintendo characters!