Just I want to get this off of me:

[solitonmedic]

What does the term "PSA" mean?
How can you replace(apply) the character models/textures outta Brawl?
How do you make thoses projects as shown here?
How can you make custom animations? Is it the same as MMD (MikuMikuDance)?
What are ".pac" files?

I just want to clear these question out of my head.
Maybe these questions may help other users in the future.

 

[Mr.Chuy]

1.Project smash attacks
2.This thread tells you
3.By making models, PSA, animations, and other things for a character in another game to replace a character in brawl
Ex. Zero over Link
4.File that does alot of things you really can't define them

 

[ChibiIceClimberz]

There's a lot of different .pac files... but yeah, what Chuy said, a lot of it is what you can't define to as something since it's just a... regular brawl file.

However, character .pac files only exist on single player/solo modes and character transformations, while .pcs files exist in group modes. Stage .pacs are obvious though, since they can only be a .pac file.