PIKACHU
DIFFICULTY: HARD - 35:65
CHAINGRAB: NO
DIFFICULTY: HARD - 35:65
CHAINGRAB: NO
Ahh, my favorite MU as pikachu is against DDD. I have a lot of EXP in this matchup thanks to Seibrik, so i will be able to help a lot.
Pika's Advantages
DDD is such a big target for pikachu, and is very easy to hit with multi-hit attacks like bair and D-smash. Pikachu's speed overwhelms DDD, and the only things to really stop it are some well placed Waddles/gordo or very well timed F-tilts. Pikachu's CG on DDD lasts until about 60%, which can be very irritating to the DDD. Also, if CGing to the edge, pikachu can grab attack when they are right next to the edge and both characters will fall off, and pikachu will be able to nair. Video example here http://www.youtube.com/watch?v=qfJR1b7Mi1w (Watch at 0:27, its basically what happens, except i was close enough to the ledge so i didn't fall off and nair)
Since DDD is huge, it is really hard to DI out of thunder if you are stuck smack-dab in the middle of it, so watch out for U-throws, U-tilts, and U-smashes. Pikachu can outcamp DDD with T-jolts and QACing above and around him. Pikachu's T-jolts also hug the ledge, so it is not advised to try to ledgebait him to a DDD suck up.
Approaching pikachu from the top is VERY ill-advised, for pikachu has thunder and u-air (Pikachu's best juggling attack), although DDDs dair breaks through it Since DDD is such a big target, DI-ing out if Pikas D-smash is a bit more difficult, for you may be sucked in. Tap DIing up is the most efficient way, but watch out, for the last hit still might get you and send you flying.
Pika's Disadvantage
DDDs bair breaks through Skull bash (pikas side-b) which can make it somewhat irritating to recover, but it is only a minor nuisance. The multiple jumps of DDD make it irritating for pikachu to approach DDD in the air or off of the cliff, for you can just jump and fair around 4 times. Quick attack can be grabbed by DDD with extremely good timing. Pikachu will die at around 85 from a u-tilt, and around 40-50 from a sweetspot forward smash. Pikachu's tech-roll doesn't move him very much, so pikachu is quite tech-chasable if you are good at it.