From what I understand for smash stack to work you just need to go to the custom stage maker. But I thought you still needed a boot.elf with something that loads to patch the files, don't you?

The strange part is that I've actually copied them from RSBE01 to RSBE just in case for that reason, I'll let you know in a few if it works.

EDIT: Still not working.

Well one of the problems is that FitLucario00 should not be renamed.

FitLucario00.pcs is the model data (so in this case everything that is Mewtwo's model is in there) along with FitLucario00.pac
FitLucario.pac is the data for the attacks

You should have at least 4 files in the Mewtwo one

FitLucario.pac
FitLucario00.pac
FitLucario00.pcs
FitLucarioMotionEtc.pac

You can use just the FitLucario.pac file but it will still be Lucario using Mewtwo's moves with Lucario's animations

You shouldn't be renaming any files for the Mewtwo one at least

Also do you have the right codes uploaded to Gecko? If you don't have the right code file in your SD card then Gecko will load the game but it won't change anything about it. Make sure you have the right code file.

Thank you, a informed, smart answer for one of them.

Aside from that I wouldn't know what your problem is.

Hey, at least you replied and tried to help, right?

EDIT- Oh also one more thing is to make sure you have the files in the right folder. For Mewtwo your SD card should look something like this
Root->private->wii->app->rsbe->pf->Fighter->Lucario

Since it's NSTC-U, shouldn't it be rsbe01? Also, like this?

Also Root is just the normal root folder of your card you shouldn't actually have a folder named root in there

I know, I did put it in the root, I learned some time ago that "Root" meant in the main spot.

Code files go into Root->codes and it should be named RSBE01.gct

Did that.

I'm using Gecko and the smash stack to load hacks, but I've got the issue of none of the hacks I download working. I've got the file patcher code installed but it doesn't seem to be working, because whenever I choose a character it stays the default, even after I use smash stack to load gecko and patch the files. I've downloaded only characters so far, specifically Simon Belmont 1.0, MMZ Zero V2, Eldiran's Zero 1.4, Ragna the Bloodedge, and Smash Bros. Melee Mewtwo v2. I've already renamed the files appropriately (for example, FitLucario00.pcs to FitLucario) but I've still seen no sign of the character hacks.

Can anyone give me some help figuring this out? I think I did everything right, but it's not working.