Sorry, but Giga Bowser is an NPC (Non Playable Character). He can only be played as through Action Replay or in SSBB
Adventure with the other 25 guys on normal 3 lives no continues. He`ll be on VS. MODE! That's a rumour. And Giga Bowser is not playable, only by a Gameshark. And the damage limit is 999%.
Play as Marth on classic mode (no continues) or play 900 vs matches.
To use Crazy Hand in SSBM GCN, go to vs mode, pick any vs mode,(stamina is more fair) pick a random character by moving the mouse like crazy,(you need to be player 4 to use him) put characters for the computer players, then pick a stage that is like final destination, then you can use Crazy Hand.
Optimus doesn't fight bowser. Who told you that?
There is 3 ways to unlock him: 1] Complete Classic Mode with all 14 starter characters. 2] Play at least one vs match with all the starter characters 3] Play 400 vs matches. Marth will then challenge you on the stage Hyrule temple. Have fun :)
all you have to do is either do adventure mode:jigglypuff unlocked.play 700 vs mode matches:mewtwo unlocked.do all characters in classic (just the characters when you started):marth unlocked.do adventure mode with marth:roy unlocked.do every character in adventure mode(including the locked ones)mr. game and watch unlocked.do adventure mode with Mario:dr. Mario unlocked.do event 29:ganondorf unlocked.do event 39 pichu unlocked.do adventure mode with link:young link unlocked.
the giant optupuses
SSJ5 Goku wins (if he wasn't in a battle then SSj4 Vegeta wins)
finish the first adventure level when the seconds is a 2 and beat adventure or play 800 VS matches
play 1000 vs matches to unlock character 25, Mr. Game and Watch. There are no characters after that.
it means you have to play 600 matches in vs aka mutiplayer
no only in extra vs mode