How do you change your Pokemon moves because I have the grass but I don..

Press x. Go to bag. Go on tm's and hm's section.(it looks like a pencil case, it is purple when you go on it.) go to the bottom of the list. Press cut. Then press yes when your game asks you if you want to teach this Pokemon that move. If the Pokemon (I think it's snivy,servine, pansage, or simisage) already knows 4 moves,select the move you want the Pokemon to forget. If it knows 3 moves or less, it will say *Pokemon* learned cut! You can use cut to chop down thin trees that are in the way of getting useful items, such as rare candies, or needing to go to another area or room. Happy gaming!