Pokkén Tournament has two standard stances, high and low, that they can switch between during battle. While these are meant to be somewhat analogous to, say, crouching in other fighting games, these stances grant certain special effects to each Pokémon.
It’s these effects and abilities that are on display in Shofu’s latest video, which highlights Blaziken’s low attack countering low stance, Charizard’s throw negating high stance, and more. As this information isn’t explicitly laid out in the game itself, we highly recommend studying this guide for the details.
Source: Shofu