nice game i unlocked all.
Level skip:
-----------
In Classic, Adventure, or All-Star mode, right click at the top left.
If done correctly, a bar will appear. Click on forward (on the bar) to
skip to the next level. In Training mode, do the same thing and it will
advance you to the next level. In Training mode, the last level you go
to will be the credits. You cannot play at the credits.
After the credits you will be taken to the main menu.
Easy wins:
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To beat 100 Man, 3 Minute, 15 Minute, jump up on the top platform.
Keep jumping and they will not get you.
Blue:
-----
Successfully complete Adventure mode under the normal difficulty
setting with Blade.
Mewtwo:
-------
Successfully complete Classic and Adventure mode with Pikachu
and Jigglypuff
Naruto:
-------
Successfully complete Adventure mode with all default characters.
Mr. Incredible:
---------------
Successfully complete Classic mode with all default characters.
Shadow:
-------
Successfully complete Classic and Adventure mode with Tails
Inuyasha:
---------
Successfully complete Classic and Adventure mode with the default
Sonic characters.
Jigglypuff:
-----------
Successfully complete Classic or Adventure with any character
at any level.
Super Sonic:
------------
Successfully complete Classic mode with Sonic.
Young Link:
-----------
Successfully complete Adventure mode with Link.
Zero:
-----
Complete Adventure as Megaman under at least the normal difficulty
setting without getting a Game Over.
Final Destination stage:
------------------------
Unlock every character.
Battlefield stage:
------------------
Complete All-Star mode.
All-Star:
---------
Unlock every character.
Cloud:
------
Complete 100-Man Melee.
Crono:
------
Complete 3-minute Melee.
Lloyd:
------
Complete Adventure mode as any character after having one hour of total play time.
Luigi:
------
Complete Adventure mode on at least the normal difficulty setting with Mario.
Mr. Game and Watch:
-------------------
Complete Target Test mode with every character but him.