what natsu strongest form is it
dragon force etherneto / episode 40
dragon force gold flames / episode 65 or 66
god flame mode / somewhere in between episode 100 -108
lightning flame dragon mode / episode 119 -120 and 152
for some reason i think the the juubi's final form will be small then kurama's form size with only half of his chakra because look at this pic
the juubi is small when compared to the other bijuu but this could be wrong it's just an idea