Ahh, Simna. One of the fastest Ness players ever. Only outmatched in speed by Fox and Capt. Falcon, or so he says.
I believe'em, though.
Anyways, back to Pichu and Ness. I figured Ness didn't counter Pichu to oblivion; he's not Pichu's hardest. Pichu has to beware of the f-air combos Ness can land on him; DJC only adds to the problem. For all I know, it could just turn out to be "f-air > f-air (flip) > f-air > f-air (flip) > f-air > b-air/b-throw" if you don't know what your up against. He' s gotta get Ness on the ground where there's still trouble, but not as much. The disjointed hitboxes can really screw you over if you're not careful. Basically, all Pichu has is only a few things.
1. Smash moves kick anus- use your best fakeouts to land them.
2. Ness may be the 3rd fastest character in the game, but Pichu's still pretty dang fast, and he runs faster than Ness normally runs.
3. Only TWO FRAMES of landing lag- it's AWESOME!
4. Possibly better and more unpredictable recovery.
5. Pichu's first jump is VERY maneuverable. It's perfect for mindgames, screwing Ness's recovery over, etc.
So yeah: Ness can be a pain for Pichu, but an awesome enough Pichu may be able to overcome the odds. Pichu sure isn't as flat-out easy as Bowser is for Ness, and Bowser still has things going for him.