In order to beat gym leaders you need a wide variety of Pokemon on your team. For the first gym leader, roark, chimchar's mach punch is a great way to beat him and turtwig and piplup can beat him naturally. For Crasher Wake, later in the game, you can beat him with a croagunk with the ability dry skin. Other than that the other gym leaders should be selfexplanatory and you should always have your Pokemon around the level of the gym leader's.
beat the gym leaders
you can do about anything after you just cant beat the gym leaders again.
You'll have to go to the gym and fight with them with your own equal or better Pokemon team.
No, however, in Pokemon Platinum, it is possible to rebattle gym leaders at the Survival Area.
beat all the gym leaders to get the masterball beat all the gym leaders to get the masterball
you cant.
You have to use a cheat.
Go beat the fourth
None of the gym leaders use Flying-type pokemon. If you want to face a Flying-type gym, you can battle against Winona in Ruby, Sapphire, Emerald, and the ORAS remakes. She’s located on the southwestern side of Fortree.
the gym leaders are the same as they are on pearl and diamond. but the order you fight the gym leaders are different. Turtwig would be the easiest way through the game.
...you beat the gym leaders
You just beat the gym leaders!