3 What is Pokemon RNG? RNG abuse is when players abuse a Pokemon game's random number mechanics to encounter any wild Pokemon, a legendary with any stats, or even breed a shiny Pokemon without any cheats, just the press of a button. ...
as you can find the frames you need to get Pokémon with great IVs and natures using that, while using this application to make finding the frame to attack and get critical hits and max damage rolls much easier, making the RNG manipulation aspect of creating a gen 3 Pokémon TAS a lot ...
The event Mew cannot be shiny without ACE editing - all its DVs are set to 15. Everything else could be shiny... I guess. I imagine it depends on the RNG...