Very good game!
This is a very good game! I love fighting games, and I love how you used sprites! Oh, and if you want to know how you unlock characters, this is what you do...
Luigi:
Complete Adventure Mode using Mario with the difficulty set on "NORMAL" or higher.
Jigglypuff:
Complete Adventure Mode with any character using any difficulty.
Cloud:
Complete the 100-Man Melee.
Crono:
Complete the 3-Minute Melee.
Naruto:
Complete Adventure Mode using all of the original 13 characters.
Shadow:
Complete Adventure Mode using Sonic, Tails, and Knuckles.
Super Sonic:
Complete Classic Mode using Sonic without losing a life with the difficulty setting on "VERY HARD". (Note: In some cases, there have been reports of glitches in the game in which you unlock Super Sonic on nay difficulty; however, it still must be on Classic Mode and you mustn't lose a life)
Zero:
Complete Adventure Mode using Megaman with the difficulty set to "NORMAL" or higher without any continues.
Young Link:
Complete Classic Mode using Link.
Inuyasha:
Complete Adventure Mode without losing a life.
Mr. Game and Watch:
Unlock all other characters, and then complete Target Mode using all of them.
Mr. Incredible:
Complete Classic Mode using the original 13 characters.
Mewtwo:
Complete Adventure Mode using Pikachu and Jigglypuff.
Lloyd:
Complete Adventure Mode with up to a total of 1 hour of game play.
Blue:
Complete Adventure Mode using Blade with the difficulty setting on "NORMAL" or higher.