ok, what would happen if two puu's were out at the same time? sure if you used substitute, Kuroko team bonus, i'm callin and calling you out work but what if either of the players didn't have those? would the game go on aimlessly until someone's decked out?

As far as I know, yes that is the way it would go if either player didn't use any cards to switch out either Puu.

Or, the first person to top deck a Banish.

or pull Unconsious but if they didnt hav ethis stuff then deck loss would decide it

Thats not totally true....

Use Malevelent Strike for one damage and regen it a lot.

-tmanf

Im not really sure about this but wouldn't Defencive Posture and Display of Power work, maybe I misread puu...

Display of Power has to be the first and last event played in the turn, so you can't Defensive Posture into it. Malevolent Strike or Reliving the Past would let Puu attack, but getting past the 8K defense is the trick. If there was Hagiri, the Hunter hanging around, then it'd be different...

no,i think theyd both just end up dying together..like whoever went first would probably loose,unless somone made a deck purposley on battles like thta nad had a stragety based apon poo vs poo battles(yes poo,not puu)

i think it would be a dream for both players because most likely they will be both playing mill so the better miller will win or whoever has the bigger deck to tak on the other's mill. with two spirit it would be hard but doable to mill the other first.

The problem with this question is that you are basing it on the fact that neither player plays any cards like ICYO, Substitute, Malevolent Strike and various other moves that are extremely powerful and staples as well.