By far, I feel this is the most important one, so here.
Save before a TRIAL/GYM, each of the ELITE FOUR, the CHAMPION, and (if possible) the LEADERS and IMPORTANT PEOPLE in all of the different teams (like N and Gethesis from team Plasma).
I do this because if I somehow loose, I can turn my DS off/close the game so the lose isn't recorded AND (if you're challenging Pokemon League) it doesn't send you back to the beginning.
YOU ARE READING
Pokemon Gaming Tips
RandomSelf explanatory. If you are failing at playing that new Pokemon game that you got for Christmas, this book is for you. Tips and hints by yours truly about how to clear the game with ease.