Lucario confirmed for Super Smash Bros. Brawl
Update: Nintendo has since removed all character faces from the sticker screen in question, including those of Lucario and Jigglypuff.
A preview video of Super Smash Bros. Brawl posted on the official Japanese Wii site has revealed the inclusion of Lucario as a playable character in the game. Jigglypuff was also seen as a returning character.
At 4:20 in the video, the faces of Lucario and Jigglypuff were seen among Pikachu's and Pokémon Trainer's in the lower right corner of the screen as playable characters who can use the powers of selected stickers in the Subspace Emissary adventure mode. In the relevant screenshot, the selected sticker is of Groudon.
The trailer also revealed the inclusion of EarthBound character Ness, who had not yet been confirmed on the official Smash Bros. Web site.
GameFAQs user Edible is being credited with discovering the characters before they were removed.