The official Pokémon website has announced the details of the Pokémon Sword and Shield Fifth Season of Ranked Battles which runs throughout April 2020.

Battle with Your Strongest Pokémon Team in the Ranked Battles April Season

Compete with other Pokémon Sword and Pokémon Shield players around the world to earn in-game rewards.

The fifth season of Pokémon Sword and Pokémon Shield Ranked Battles has begun and will run throughout April 2020. Test your Trainer skills in head-to-head battles with players around the world, move up the leaderboards, and earn in-game rewards.

You can head into battle with Galar Pokédex Pokémon No. 001–397, along with the following Pokémon: Bulbasaur, Ivysaur, Venusaur, Squirtle, Wartortle, Blastoise, Slowpoke (Galarian Form), Rowlet, Dartrix, Decidueye, Litten, Torracat, Incineroar, Popplio, Brionne, and Primarina.

If you're looking to add some Gigantamax power, be aware that the following Pokémon are the only ones you can have Gigantamax versions of on your team: Charizard, Butterfree, Pikachu, Meowth, Kingler, Lapras, Eevee, Snorlax, Corviknight, Orbeetle, Drednaw, Coalossal, Flapple, Appletun, Sandaconda, Toxtricity, Centiskorch, Hatterene, Grimmsnarl, and Alcremie.

Before battle, you'll be matched up with other players of similar rank to ensure even competition. When the season concludes, the higher the tier you finish in, the greater your in-game rewards. You'll be able to earn Battle Points, mints, Ability Capsules, and Bottle Caps.

To start a Ranked Battle, select VS in the X menu, select Battle Stadium, and then select Ranked Battles. You can press the Y Button to see an overview of Ranked Battles before you begin your match.

Have fun battling, and check back later for more Ranked Battle season news.

Source: https://www.pokemon.com/us/pokemon-news/battle-with-your-strongest-pokemon-team-in-the-ranked-battles-april-season/