Nine Tailed System:

Features: Nine Tailed Gates, Special Quests.

Nine Tailed Gates:

Start: Surrounds Marco with a small red aura.

1st Gate: Surrounds Marco with a thick red aura, creates 1 tail, the aura is able to extend itself to anything under a certain range to work as longer limbs, it is really hot.

2nd Gate: creates 2 tail.

3rd Gate: creates 3 tails, denser aura.

4th Gate: Surround Marco's body with really dense aura, completely covering his body with dense and incredibly hot aura, creates 4 tails, be able to create another body part from the first which may act or not on his own, be able to use Bijuudama.

5th Gate: creates 5 tails.

6th Gate: Develops a fox skeleton, creates 6 tails.

7th Gate: Reach Kurama's size, skeleton is inside the aura, but still visible, aura becomes darker, with a tint of crimson, creates 7 tails.

8th Gate: Develop muscles, eyes and teeth, but the tails remains a aura-made construct, creates 8 tails

9th Gate: Completed nine tailed fox, with fur and other things, creates 9 tails.

To pass from the 1st Gate to the next one, Marco needs 30 seconds of cooldown

I know all about the 1st version and 2nd version of the transformation, and I decided it myself that at the 4th Tail, Marco will change in the 2nd Version.

At the 9th Gate, he will look just like Kurama.

Ask questions in the comments and I will answer them.