This thread isn't meant to be serious, so dont get mad.
Juubi is at final form.
Gets sealed, split up into 9 bijuus again.
Then we have 11 bijuus :d
Part of the 9 bijuus gets sucked back up in the new gedo mazou.
Make new juubi.
Seal, split up again, 20 bijuus available.
Rinse and repeat...