clear adventure mode
you have to unlock all the events and one of the events unlocks jigglypuff
complete adventure with pikachu and jigglypuff
In SSF (Super Smash Flash) you must play as Pikachu on Adventure Mode on Very Easy and then defeat Jigglypuff to unlock him.
Jigglypuff - Clear Event Mode.
you can unlock jigglypuff by doing event number 10
you need to do adventure as pikachu and jigglypuff
You unlock jigglypuff by completing all 10 events and I belive that you unlock pichu by beating everyone with pikachu.
Go on how to unlock all characters in super smash flash
tell me some ways to unlock cloud on super smash flash
You can't unlock Shaymin.
Be Jigglypuff And Pikachu In Adventure Mode
Sorry. you can't unlcok him in super smash flash. But look somewhere if he is in one of the Super Smash Flash 2 versions and unlock him. Good luck :-)