easiest way to do this is to pick three different iron mans, make sure your power gauge is full, and then use proton cannon,when this almost over, use another by tagging in iron man, and keep repeating until your gauge is empty. you have to be really fast to do this and it may take a few tries but it works. oh try it in practice mode first.
Exit and enter the shop screen until the price of the hidden characters are lower.
You can get ten points a minute if you go to training mode, choose your characters and opponent, then leave the game on for about five hours. Note: Do not pause the game. Additionally, a good time to leave the game running is right before you go to bed.
At the character selection screen, highlight a fighter, then press A or Y.
While the round is loading, and Dan is the first character to come out in your line up, hold X and B to see Dan's hidden intro.
Dan has a unique super arts, the Shinkuu Taunt.
The move is as follows: HCF,HCF + Taunt (Start+ LK)
Dan will roll towards the opponent screaming all sorts of obscenities, jump in the air to finish with a thumbs up. Note, this move doesn't do any damage and leaves you very very vulnerable.
Select Cable. For Abyss' first form, just block his attacks and then press Y to shoot. Repeat this until he dies. For his second form, distance yourself as far as possible and press Y to shoot. Repeat until he dies. For his third form, just use Cable's Hyper Viper. It takes off 90-95% of his life in one blast and will be a 115-130 hit combo. Then, just hit him once or twice with any attack to defeat him.
go to main menue then go to tranning and pick whoever for both sides then leave it over night the press start and go to mainmenue and as it leaves it will say some points you erned. the points will be huge
Unlock everything in the shop and get a 99 experience level to select the same character up to three times in arcade mode.
Use the following to switch between characters in the middle of the game. For example, if you choose Cable, Ken, then Ryu, but later in the second stage you want Ken to appear first, hold L for the second character and R for the third character at the versus screen.