The Weather Institute (Japanese: てんきけんきゅうじょWeather Research Institute) is a weather research building located on Route 119 in the land of Hoenn, in Pokémon Ruby, Sapphire, and Emerald .
The Weather Institute is like a bureau for the Hoenn region. It checks and keeps track of weather conditions throughout Hoenn. Its main project is the weather control machine which allows them to change the weather in areas. The Weather Institute has created a Pokémon named Castform which can do this.
The Weather Institute has two accessible stories, both with many desks and computers. On the far left side of the bottom floor is a PC and bed which can heal the Pokémon in one's party.
Ruby and Sapphire
On the first trip through Route 119, the player will find that Team Aqua (Sapphire) or Team Magma (Ruby) have invaded the Institute, looking for information about Kyogre or Groudon, respectively, and the rare Pokémon, Castform. The team has also blockaded the bridge, preventing further progress. The team must be defeated, and Castform received, before advancing to Fortree City.
Emerald
Like in Pokémon Sapphire, Team Aqua must be defeated before further progress can be made. Again, once they are defeated, Castform will be given to the player.
In Emerald, this facility is used to find Groudon and Kyogre after defeating the Elite Four. By speaking to the meteorologist inside, players will learn of unusual weather patterns in certain routes. If he says there is a drought, Groudon slumbers in the Terra Cave; if downpours are coming down, Kyogre awaits in the Marine Cave. The other legendary Pokémon cannot be located until the first is captured or defeated.
Castform
Once the player defeats the villainous team and saves the Weather Institute, the professor of the institute will give the player a Castform.
Trainers with a PokéNav by their names will be registered in the Trainer's Eyes or Match Call function after the first battle, and may have a rematch with the player with higher-level Pokémon.
In the anime
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In Unfair Weather Friends, Ash and his friends travel to the Weather Institute, where they get caught up in a takeover by Team Aqua. Team Aqua plan to steal all of the weather data but their plan is stopped by a disguised Team Magma member who escapes with the data himself.
In anime, the Weather Institute contains many rooms with many different machines. A weather data machine stores data like temperature and weather patterns on a large computer so they can do tests and experiments later. There is a huge satellite outside the institute called the Weather Control Machine that can control the weather. There is also a study filled with books and scrap paper.
Trivia
A woman west of Pastoria City in Sinnoh says she used to work at the Weather Institute of Hoenn. She will trade TMs of weather-changing moves for shards.
