You can buy TM18 Rain Dance from the Technical Machine Shop in the Royal Avenue Pokémon Center. This shop also sells the TMs for the other three weather moves (Hail, Sunny Day and Sandstorm).
Royal Avenue is located on Akala Island. You will gain access to Royal Avenue after completing the Brooklet Hill trial.
Obtaining TM18 Rain Dance (Step-by-Step)
While playing through the game you will enter Royal Avenue from the west, via Route 6.
Step 1: From Royal Avenue’s western entrance, walk east along the road.
Step 2: Continue walking east until you arrive at the Pokémon Center. Head inside the building.
Step 3: Inside the Pokémon Center, walk up to the counter on the right side.
Step 4: Talk to the clerk on the right side of the counter. Select “Buy” from the menu.
Step 5: Select Rain Dance, which is the third item from top to bottom. The TM costs 50,000 PokéDollars.
Rain Dance Details + Use
|Rain Dance Move Details|
Rain Dance is a weather move that triggers rain when used in battle.
Rain lasts for five turns in battle. But Pokémon holding a Damp Rock will extend rain to eight turns.
In battle, Rain Dance will interact with the following moves:
- Boosts the power of Water-type moves by 50%.
- Decreases the power of Fire-type moves by 50%.
- Under rain, both Thunder and Hurricane will bypass accuracy checks.
- Decreases the power of Solar Beam and Solar Blade by 50%.
- Decreases the recovery power of Moonlight, Morning Sun and Synthesis to 25% of the Pokémon maximum HP.
The following abilities will also interact with rain in battle:
- Swift Swim will double the Pokémon’s Speed stat under rain.
- Pokémon with Dry Skin will recover 12.5% of their maximum HP.
- Pokémon with Rain Dish will recover 6.25% of their maximum HP.
- Hydration will heal a Pokémon’s status condition.
Rain is usually considered the most popular weather strategy in competitive Pokémon. Rain Dance, however, isn’t a popular move in rain teams.
Most rain teams will run a Pokémon with the ability Drizzle as the weather setter. A Pokémon with Drizzle will instantly trigger rain when entering a battle. Unlike Rain Dance, Drizzle doesn’t require a full turn to set up.
Rain Dance can be used as a backup plan in a rain team. In some cases, teams will choose to run a secondary weather setter in case the Drizzle Pokémon goes down. The secondary setter will usually have Rain Dance in its moveset.