Okay here goes, I already posted like a freaking essay on the 'Help vs. Snake' thread.
ddd's chain throw can be escaped by downwards DI. His throw will send you into the ground, safe from another grab, however you are still vulnerable to his ftilt. ddd's dthrow to ftilt cannot be escaped until higher percents with backwards DI. In general, don't get grabbed.
Waddle dees can be killed by attacking them. So if ddd reaches for one, just ftilt it away. Waddle doos are more dangerous for their electric attack. They won't use the attack if ddd throws them though, they have to be walking around for a period of time. Again, just ftilt it away. Gordos are evil, dodge at all costs, not much else I can say; you shouldn't be seeing it much, though.
For more information, just read my replies. Though it's about Snake, ddd is still fat, so whatever.
http://smashboards.com/showthread.php?t=155798