lol but now im trying to make the ultimate scizor with techician! and then im breeding some bullet punch/crosschop/blazekick/crunch riolus! thats gonna be streesful
RNG stands for Random Number Generator. You can manipulate the RNG to make the game produce a certain value (which determines IVs, shininess, gender, ability, nature, etc).
It's very complex, but there are guides, if you're interested in learning. I don't RNG abuse most of the time, as it requires patience.