This guide will help you find and fight the legendary Pokemon Regigigas in the Pokemon Sword and Shield Crown Tundra DLC.
Regigigas can be obtained by collecting all five regirocks: regirock, regis, registill, regieleki, and regidrago.
How to Get All Registeels-Registeel, Regirock, Registeel
How to get Regieleki and Regidrago
You will only be able to collect 4 of the 5 Regis required during the playthrough (you will have to choose either Regi Electric or Regi Drago) and will need to exchange them for someone who does not have them.
Once you have collected all five Regis, make sure they are attending the party and head to the Watt Trader at the foot of the Snowslide Slope.
From here, look back and enter the giant bed area. Turn right and walk two trees towards an empty Pokemonden surrounded by four rocks.
It doesn’t glow red, so it looks empty, so you know this is the correct Pokemon Den.
Interact with Pokemon Den at all 5 Regis at your party Start the battle with Level 100 Dynamax Regigigas..
This battle is very difficult because you have to fight alone and no one can take you. Thankfully, Regigigas has a 100% catch rate once defeated. In other words, you can use your favorite Pokeball.
Find a place to get the rest of the Crown Tundra Legendary Pokemon.