First, go to the menu and go to New Game. Pick yes by pressing A. Right after you watch the show about the Red Gyarados, go to menu by pressing X, then try to save several times. Then, restart your game and go to Continue. Press X and go to Options. There should be a change gender and change name options there. If not, you might not have saved enough or the
creator mistakenly pulled this cheat out of your gamecard. Not my fault because everyone I know has done this cheat. My name went from Emma to Emmy.