In Pokemon Ruby and Sapphire, the weather played a huge role in Pokemon battles, as well as the story itself. Now, Pokemon Go will finally be utilizing this effect, as well as add 50 more Gen 3 Pokemon.

Here’s how Niantic describes how weather will affect the game:

 In addition to the in-game map being updated with cool new weather visuals, weather near you will impact Pokemon in a variety of ways. For example, you’ll find your odds of discovering Mudkip splashing around will greatly improve on rainy days, as certain Pokemon types will be more commonly found during various weather conditions. Additionally, attacks of certain types will be more effective during some weather conditions, so a Charizard’s Fire Spin will perform better on sunny days, for example. Rain or shine, winter or spring, your gameplay experience will remain fresh, making your time outdoors even more exciting.

So, it looks like the weather attacks like Rain Dance and Sandstorm will affect the game better, huh? However, do keep in mind that going out during HAIL and SANDSTORMS might be dangerous…

In addition, the video also teases several other great Pokemon, such as Aggron, Shiftry, and the Pseudo-Legendary Dragon Pokemon, Salamence. However, the biggest tease they did was for the Legendary Pokemon, Groudon.