Hi! I heard you wanted to do Emerald RNG? Well it's quite simple, but shinies aren't the best idea for someone new to it. Basically the way the RNG works is the seed is always the same (0) and it advances at a rate similar to delay. Each frame has it's own set of PID and IVs and the more flawless the spread you want is, the more likely you will have to wait for it. Most flawless spreads occur around 10 million + frames so you might have to settle for a less than flawless spread for Deoxys if you want to get it done in less than a day.