Avoiding Final smashes

Was reading the Evo thread on smash brothers and I notice that allot of ppl seem to say how a good player can dodge or counter the final smashes. Would anyone like to share how for some of them.

Specificaly I was thinking of Kirby and his FS. Just about any time one of my buddies does his FS it sucks in everyone.

Swing by this thread:
http://forums.shoryuken.com/showthread.php?t=151754