What button switches stance in UFC 6?

Right-stick click: R3 on PS5, RS on Xbox.

Why did my buttons flip when I changed stance?

You have stance-based striking set to swap lead and rear. The settings guide explains the two layouts.

Not until the basic jab, block, and takedown deny are automatic. Switching is a tool, not a habit.

Switching stance swaps which hand and which leg are forward. Do it with a reason, or you will throw the wrong hand.

How to switch Orthodox and Southpaw in UFC 6, when it helps, and how the HUD and buttons change.