Hey people

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Please excuse me, but this is my first time on this forum. I recently got into hacking Brawl, and it's very fun. One thing that's been making me wonder is that in some videos I've seen on Youtube, on the character select screen, there are extra slots for other characters, like for example, there are slots for characters who are not even playable or weren't even put in the game, such as Shadow, Cloud Strife, Masterchief, etc. How exactly can I add more character slots to the game without having to replace the regular Brawl characters? And, is there a step by step tutorial on how to do it? Again, please forgive me for this stupid question, this is my first time on this forum so I'm not really sure how to do this. Thanks for replying guys
