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Battles are action combat(using PS controls for reference)
move with dpad/stick
Square is your basic attack(scratch, tackle, etc)
X is jump, hold to fly or dive
O is block, or a dodge/sidestep if you're moving
Triangle to swap pokemon
R1 R2 L1 L2 are your actual attacks, still have PP but it regenerates slowly
Pokemon have traits and abilities, Fearow can fly forever, Suicune becomes water/untargetable when diving, etc
Not sure how defensive mons would work, particularly ones like Chansey who don't really "fight"
Unsure how similar this is to pokken as I havent played it