Pika's "bacon?" looks fun! I did some reaserch and found something!
I haven't played Pokemon Emerald, but apparently "Volt Tackle" is an actual move that is exclusive to only pichu, pikachu and raichu in pokemon emerald, and it seems that this move isn't in the other pokemon games.
"Volt tackle" isn't a learned ability, but rather, a pichu must be born with it in order to know it. Since this "Volt tackle" is Pikachu's "Bacon" and not pichu's, do you think this could be a hint that pichu may or may not be reappearing in Brawl? Just a thought....
Also, "Volt Tackle" does damage to the one who deals it out, as well. Do you think this means that pikachu will do damage to himself when dealing out the "volt tackle" in SSBB also? Do you think that any of the other "Bacons" will cause characters to deal damage to themselves- example: Maybe Samus turns to ZS samus after she performs her massive blast for her "Bacon?"
here is one of the links i used to find this stuff out:
http://bulbapedia.bulbagarden.net/wiki/Volt_Tackle_(move)