Larsenv here - want to learn stuff

Hi, I just joined this forum because I want to know how to extract Super Smash Bros. for Wii U models (it's an encrypted mess) and learn how to decrypt Kirby and the Rainbow Curse's .bfres.cmp files (ntcompress doesn't work on these .cmp files).

Any help would be appreciated, including pointing me to the right posts and such.

Thanks.