Blackadder
Smash Master
Change the knockback accordingly. Problem solved, methinks.It's because every time you lose HP, your character gets knocked off farther as if it had more %. For example, when you start the battle with 150HP, the knockback is the same as 0%; but when you are at 100HP, it's equivalent to 50% -- and so on, until 1HP = 149%. If one could set the HP too high, the probability of ending the match by knocking the opponent off the stage (instead of depleting its HP, which is what Stamina matches are all about) increases accordingly.
I think what Kerkola was getting at was why it seems you can't make the HP "34%" and anything else you want at all as apposed to pre-set selections that Brawl offers you.
Or I could be completely wrong...