Pokemon GO Lure Modules are one way to evolve a Pokemon. These items temporarily attract Pokemon to a PokeStop. Thematic Lure Modules have been added since the game's release to attract and evolve Pokemon.

The Rainy Lure Module came to Pokemon GO in May 2021 and evolved Sliggoo into Goodra.

Previously, they had to wait until it rained in-game, but now they can get Goodra by feeding Sliggoo 100 Goomy Candies near a Rainy Lure Module. 25 Goomy candies evolve into Sliggoo.

Rainy Lure can attract Water-, Bug-, and Electric-type Pokemon.

Eevee's evolutions are famous. Two need a Lure Module. Normal-type Leafeon evolves when fed 25 candies near a Mossy Lure Module.

This mimics the main series, where Eevee evolves near a Mossy Rock. In Pokemon GO, Mossy Lure evolves similarly.

Mossy Lure Module attracts Grass-, Bug-, and Poison-type Pokemon.

First, you can buy them in-game. Specialty Lure Modules cost more than 100 Poke Coins. 180 Poke Coins each.