I decided to make a simple replacer.

I think he will be able to go SSJ3 with a skillset edit since it's really more of a preset I found in the game under FOF meaning it should function like an actual Cac with these things.

Even though it says Tien in screenshots it really replaces Cell Jr.I just decided to use Tien since I haven't gotten far enough to unlock Cell Jr.

Ok

Remember libxenoverse which came with batch files that allowed you to pack and unpack the cpk files?

Well unpack data 2

go into data2/data/chara and make a CLJ folder.

put this mod there and repack using those files.

It's not rocket science!

Also if you want a different character for him to replace just rename files.