Mauville City is located within the centre of Hoenn. This city has routes connecting it in all four directions. It doesn't have much within it but does contain the bicycle shop where you can go to switch bikes at any time.

Game Corner
The Mauville City Game Corner has got two games to play. First, it has standard slots which work in the same manner to previous games and second it has a Roulette wheel where you can place bets based on colour, Pokémon or a single space. If the ball lands on a space which matches, you will get a payout.

Move Tutor
In Emerald, in the middle of Mauville City, there is a trainer who will teach your Pokémon Rollout. There is no charge for this tutor, but it can only be taught once.

Name	Type	Cat.	PP	Att.	Acc.	Effect
Rollout			20	30	90	The user continually rolls into the target over five turns. It becomes stronger each time it hits.

Gym
The Mauville City gym has got a standard electic field puzzle. This puzzle creates electric fields blocking your path. In order to proceeed through the gym, you need to defeat trainers to gain access to switches which disable the electricity. At the end is Wattson, the Electric-type Gym Leader who will give you the Dynamo Badge and TM34, Shock Wave, if defeated.