Valkyries are Rabbid enemies in Mario + Rabbids Kingdom Battle. They wear armor equipped with machine guns that destroy Mega Blocks and inflict multiple hits on their targets. Like Hoppers, they can perform Team Jumps; however, their jumps end with a Ground Pound that can damage anyone within range of their landing. They are also capable of using Protection to shield allies, reducing the damage inflicted to them by absorbing some of it themselves.

The introductory cutscene starts with the characters strolling through the area, where they get confused when bullets getting shot everywhere around them form a heart shape. A Valkyrie then Ground Pounds nearby and starts attacking the heroes with the Rumblebang-like weapons on its chest, followed by the introductory tagline appearing above it.

Source: https://www.mariowiki.com/Valkyrie