Easy. First beat the subspace emissonary story mode. then you have 3 characters left over:
-Toon Link
-Jiggly Puff
-Wolf
to get Toon Link you go to the forest stage, and the first door you come acroos is in the air in the beggining. go in it and defeat him.
to get wolf you go into the ruins. when you go to the down elevater part with the spikes, you go all the way down. there will be a door, go in it and defeat wolf.
to get Jiggily puff you go in the swamp stage. After u defeat Giga evil Diddy KONG the first door you get there has juggly. defeat her and you unlock them.
you can unlock characters in story mode :)
story mode
you have to play story mode to unlock other characters
By doing the story mode.
to unlock everything you can either unlock characters/items by playing expiedition mode or doing challenge mode which you can unlock by defeating Bowser Jr through many journeys in super sluggers
Okay gamers do the story mode
you unlock konkuro in story mode you unlock the other characters exept for itachi in vs.cpu mode you unlock itachi in singal player mode.....!!thats all!!!...
To unlock Thanatos,finish story mode with all characters and to unlock valesca well she just appears randomly if you play story mode and if you beat her you unlock her (need valesca to get thanatos THERES YOUR ANWSER
To unlock Tupac in "Def Jam: Fight for NY" on PS2, you need to complete Story Mode. After finishing the main storyline, you can unlock him by defeating him in the final boss battle. Additionally, if you want to use cheats, you can enter specific cheat codes to unlock all characters, including Tupac, without going through the story mode.
well you can by doing the story mode
there is only 1 character you have to unlock and that is Sheen. to unlock him play on the tournoment mode, then, beat him at the last person. he will always appear.
beat story mode and finish all the missions