EDIT: @Seagull
^For a second I thought that would be a meaningful post.
fyi, that's how Spoiler tags work in most forums, the blacked-out style is something I had only seen on danbooru and 4chan (please, if you don't know them, don't google them). I hadn't see the collapse tag in any other site before SWF, and I loved it.
It's like you guys haven't been in any other forum. SWF was by far the best organized, with the best features and best looking one I had been in a while.... I miss it, but I hope the staff can get everything together soon and start adding old features.
Anyway, Pikachu is a very mobile character with even more options at neutral than MK.
It might not be as good as ESAM makes it look like, but has many tools that can make work with high mobility. He can be on your face and grab you at virtually any time, and that's a very important part of the MU when he gets such a humongous reward.
If anything, the Falco-Pikachu MU can be moved to -1 because Pikachu doesn't really have many killing options that don't require a read. But then again, Falco's kill setups aren't that much reliable either...
Anyway, I don't use any of the two characters.... I just didn't want to make an "empty" post.