first of all which two characters did you put?
and if you removed them you shouldn't need to put the original files back
Master Chief over Falco by Leon Exodio, CaliKingz01, jasonvalle22
Naruto Over G&W by CaliKingz01, mnsg, .Fade, Oizen, ds22, KTH, Maxi, SmashClash, SSJCerious, Rikiki
That's how it was like originally. Everything seemed to be working fine, but all of a sudden I have noticed freezing when trying to start a match with those characters, so I tried replacing the characters with .pac and .pcs files that I know have worked previously, but both characters will still freeze. It pretty much feels like the game is not acknowledging and letting me change the characters at all, and it is just stuck always freezing like it always does.
I can edit any characters successfully except falco and game&watch