[Help] How would I edit a character's PSA to manually give them a Melee air dodge?

[SomeGuyNamedW]

Some characters that I replace and add in, seem to have the regular brawl air dodge so I was wondering how could I edit it to fit the rest of the character's melee air dodge so they can wavedash? I know you can use brawlbox to do this but I haven't found any tutorials specifically talk about this.