if you mean by: can you unlock any more secret caracters in brawl? then i dont think so.
In SSF (Super Smash Flash) you must play as Pikachu on Adventure Mode on Very Easy and then defeat Jigglypuff to unlock him.
There are a couple of ways: Do 350 matches of brawls, then fight Jigglypuff and win in a brawl Complete the Subspace Emissary, then complete Classic with any character (someone told me except Ike) Complete Subspace Emissary, then events #1-#20, then fight and beat Jigglypuff in a brawl Complete Subspace Emissary, then go on the stage "The Swamp" again. There will be a door (quiite late on) in there which leads to a brawl with Jigglypuff in Pokemon Stadium 2. Win, and you unlock Jigglypuff, and also add her to your Subspace Emissary Team.
you need to do adventure as pikachu and jigglypuff
you have to unlock all the events and one of the events unlocks jigglypuff
wolf is not a playable character on this update but you can unlock jigglypuff by doing event number 10 and you will have to wait until the full verison comes out
350
You can't unlock Shaymin.
You can unlock Luigi, Jigglypuff, Ness, and Captain Falcon.
You can unlock some characters in any order you choose, but some need to be unlocked by clearing certain modes with a certain character. For example, you can only unlock Mewtwo if you clear adventure mode with both Pikachu and Jigglypuff (you need to unlock Jigglypuff first). Mr.Game & Watch can only be unlocked if you clear target test with all the other characters in the game, including Lloyd.
clear adventure mode
Unlock Captain Falcon: In under 20 minutes beat the 1-Player game with any character on any diffculty. You will then fight Captain Falcon and if you defeat him you can play as Captain Falcon. Unlock Jigglypuff: Using any character on any difficulty setting beat the 1-Player game and you'll then be able to fight Jigglypuff. If you defeat him you can now play as Jigglypuff. Unlock Luigi: Using ALL 8 of the original characters beat Bonus Practice 1. This can be achieved in Bonus Practice mode or in the 1-player game. Unlock Ness: Using any character beat the 1-Player game on Normal difficulty setting using only 3 lives and without continuing. When this has been achieved you will then fight Ness and if you win you will be able to play as Ness.
you unlock jigglypuff,ness and falcon.and they are 4 not 3.