Nimbasa City Gym

Head to the Nimbasa City Gym, themed like a theme park's Space Mountain. Electric Pokémon are weak to Ground-types. Grass types may struggle due to Emolga's presence.

If you need a Ground-type, return to Wellspring Cave on Route 3 for Drilbur or Route 4 for Sandile. These Pokémon take no damage from Electric attacks.

Grab a Fresh Water from the guide. Proceed forward and enter the first car on the track. Exit at the first stop.

Head around to your first trainer battle: 2x Emolga (Level 24, Electric/Flying).

There are no trick switches. Step on them as desired.

Hit the nearby button to change the rollercoaster's course. Get back in the car where you exited and disembark at the first stop.

Run left and up to find your next trainer battle: 1x Blitzle (Level 25, Electric).

After the battle, head up and hit the green switch. Enter the coaster at the next stop to be attacked by 2x Blitzle (Level 24, Electric).

After this fight, enter the coaster and enjoy the drop. Exit at the stop and jump on the orange switch.

Enter the next coaster to face your next opponent: 1x Emolga (Level 25, Electric/Flying).

After defeating this Emolga, hop into the coaster and ride the final track to face Gym Leader Elesa.

Gym Leader Elesa's Pokémon: 2x Emolga (Level 25, Electric/Flying), 1x Zebstrika (Level 27, Electric).

Elesa's Emolga can use Aerial Ace against Grass or Fighting types. Her Pokémon can use Volt Switch to switch out, potentially disrupting your strategy. A strong Ground-type Pokémon is highly recommended.