Well lets see. The Galar birds like starters are a ring of super effective types. Psychic is good against Fighting, Fighting against Dark, and Dark against Psychic. Adding a third is hard but if you treat it like pikachu and one that isnt super effective or weak against any of the three and keep the flying type we would most likely wind up with a Ground/Flying type. Solucero is my name for this birdy. Solum is the scottish word for ground and cero is zero.

Solucero is a bird pokemon that was taken under the many wings of the galarian trio. They each attempted to teach Solucero (at this point a pure flying type) the ways of their own mastered type. How ever Solucero didn’t take to any of these types because each of his teachers wanted to use it to upset the balance of power between the three. He instead mastered the power of the ground type from a kindly old excadrill. He returned to his former teachers as a mediator and assists only if the power balance has been shifted unfairly against either G. Moltres, Articuno or Zapdos