Beat all 40 events to unlock event 41
Simply finish the events before that and if the event still doesn't appear you may have to unlock more characters.
Beat all the solo event matches.
Complete the events you currently have and unlock all the characters then complete the rest of the events.
you can't
Complete Event 25 (The Aura Is With Me).
beat sheik and ness
Practice, practice, practice.
you have to beat event match 25
you can unlock jigglypuff by doing event number 10
Jigglypuff - Clear Event Mode.
no, the final event is the battle with snake, sonic and giant Mario on event 41.
To unlock Pichu, complete Event 37 called Legendary Pokemon.