TGM you are too awesome.
The problem Marth has against DDD isn't the chain grab... I've having problems killing him and his ftilt. That's about it.
I can usually get them down to there last stock, but all 3 of their stock they live to about 180+. It's hard enough that Marth doesn't have a kill move that's safe on block, but even when you do land it he doesn't die.
I usually just have to switch to my MetaKnight for DDD. He's insanely hard to fight with Marth.
And DDD and Snake are the strongest characters at the tourneys I go to... So my Marth usually takes a back seet if I know someone play DDD well.
I am Washu-bot B, loyal servant of Final-Fan, the greatest scientific genius in the universe!