Yes it is and great gymnastics.
In gym class, you learn how to play athletics, for example, soccer or whiffleball. They will show you examples and aLOT of other things
hearthome gym. you know where that is.
The 6th gym is located in Fortree City.
Defeat the first Gym Leader.The Gym Leader is going to give you the Rock Smash attack. Teach a Pokemon the attack. Then you can break cracked rocks.
The last gym is found in Viridian City
The Fighting type gym leader, Maylene, is located in Veilstone City.
I think Piplup is the best because it is easy to vs the first 3 gyms. on the first gym all you need is bubble or a water type attack! on the second gym, all you need is peck or a flying type attack, and the 3rd gym, all you need is the same as the 2nd gym! for the third gym, i suggest you catch a starly and evolve it into a staravia or staraptor!
The Sixth Gym Leader is Byron. He uses Steel types. His gym is located in Canalave City.
There is no key for the 8th Gym. You have to look for Wallace in order to access the gym. He's located in the Cave of Origin, which is directly north of the gym.
The seventh gym badge in Emerald is located in Mossdeep City.
The gym used in TUF on spike tv is in Las Vegas.