Pokemon Legends: Arceus - Request 37 Guide (The Fragrance of Nostalgic Herbs)

gamerant.com:

Players would be wise to complete requests in Pokemon Legends: Arceus. Not only will they give rewards, but they may require players to catch an uncommon Pokemon. While the Pokedex entries do not need completing, catching and meeting every last Pokemon in the Hisui region is necessary to complete all of the main Story Missions.

After making some progress in Pokemon Legends: Arceus' story, more requests will be open to the player. This includes Request 37: The Fragrance of Nostalgic Herbs. The Pokemon that needs to be caught is the Grass-type Pokemon, Tangela. It may not be all that rare nor is it a Legendary, but it's still needed for the Pokedex, so players may as well get a reward out of it.

Pokemon Legends: Arceus — Request 2 Guide (Adorable Starly)

To unlock Request 37, players must have done the following:

Once these steps have been completed, players should return to the Galaxy Hall and take the stairs to the bottom floor. There should be a villager (Risa) with the request icon over her head. If players speak to her, and she'll mention a peculiar Pokemon covered in vines. Familiar fans of the Pokemon series will know that she's referring to a Tangela, so the next step is finding one. Fortunately, Tangela can be caught as early as Crimson Mirelands, but if players want to wait, Tangela can also be caught in the Cobalt Coastlands.

Despite Tangela's habitat being listed as Gapejow Bog in Crimson Mirelands, players can also find a Tangela at the location indicated in the image above. In fact, this area will have two Tangela. The quickest way to reach them is by heading northwest of Bogbound Camp. This means crossing through or along the Scarlet Bog, which is home to numerous Poison-type Pokemon.

The Tangela in the Cobalt