Save at all legendaries so you can soft reset over and over till you get a shiny, save your master ball for Latios, pick Torchick but tbh Mudkip becomes much better at his final evolution(the water+mud type combo is great.), Shroomish evolves into Brellom and Trapinch will evolve into Flygon both two of my favorite I had on my team back in the day. [spoiler]I'm sure there's more, if you have any questions let me know. That was the last gen I really cared for and played, have a good time![/spoiler]