who created the bijuu

[Uzumaki Kato]

if the so6p sealed him must be something that created the bijuu

 

[Kryptiic]

I think it was made from pure hatred

 

[ninjastormgenaration33]

I think it was made from pure hatred

This

 

[Zoro..]

I made it
jk
I agree with above

 

[Toshiro]

What he said, I believe it was all our hatred formed in some type of Dimension and too much clogged it so then the Jyubbi formed...
The Jyubbi then went Berserk and broke out of the Dimension and came to Earth and rampaged...
Or the Jyubbi is a Alien from outerspace...

 

[White Zetsu]

The bijuu were made just like the trees.They came with the existance of the nina world.It was always around but it was the Juubi before (10 tails) then the S06P seperated it into 9 different parts with his Creation of All Things jutsu.