Niantic has announced that Landorus, the Abundance Pokémon, is coming to GO Battle League and five-star raids from Tuesday, March 31st, 2020, at 1:00 p.m. to Tuesday, April 21st, 2020, at 1:00 p.m. PDT (GMT −7).

The forces of lightning and wind call Landorus to Pokémon GO!

Trainers, Landorus, the Abundance Pokémon, is coming to GO Battle League and five-star raids! This Ground- and Flying-type Legendary Pokémon, originally discovered in the Unova region, will be making its Pokémon GO debut.

Date + Time
From Tuesday, March 31, 2020, at 1:00 p.m. to Tuesday, April 21, 2020, at 1:00 p.m. PDT (GMT −7)

Features

• For a limited time, Landorus will be coming to the GO Battle League as rare reward encounters, starting at rank 4!
• Landorus will make its debut in five-star raids.

Landorus is also known as the Guardian of the Fields, as it grants bountiful crops to the lands it visits. Be sure to bring Water and Ice types to challenge this Legendary Pokémon in GO Battle League and in raids!

Source: https://pokemongolive.com/en/post/landorus-raids-mar2020/