In Sword and Shield, the Dynamax does not always duplicate your HP. It depends on your Dynamax level. At level 0 you get a x1.5 HP boost and at level 10, the highest, you get a x2 HP boost. I suggest adding this to Showdown, which could make it be unbanned from any tier (For example, rn a Dynamax Suspect Test in Randoms is being made. Maybe set the Dynamax health to x1.5 in this format makes it more playable), or just to people who would like to test their ingame team in PS but his team does not have the highest Dynamax level, making it impossible for them because of this barrier.