Training

[2 years later]

Yamamoto: "Rodan come out." A large flame shot out of his chest and formed into a 10 meter long pterodactyl with a 30 meter wingspan.

Aki: "Master what is this creature and how did it come out of you."

Yamamoto: "I will train for 5 years before joining the academy so I need to train as for your question this is Rodan he was summoned by me. I will leave now.

Rodan: "Screeeeech."

Yamamoto hopped on Rodan's back and the headed towards a canyon.

Aki: "Master wait." She tries to keep up with them but Rodan's speed was absurd and she ended up getting left.

Once they arrived Yamamoto started to train his body by doing a 1 km run, 100 push up, 100 sit ups and having Rodan peck his body.

Yamamoto would bring boulders to the top of the canyon and destroy them then have Rodan fly up to him through the falling rocks to strengthen him.

After hours of training Yamamoto sat down with a sigh and a shadow appeared behind him.

???: "Oh Master."

Yamamoto: "Fuck."

[2 years later]

Yamamoto was now 5 he has no more baby fat and was slim but muscular. After these two years of only training his body he decided its was time to eat his devil fruit and train his zanpakuto.

Taking out the flame flame fruit he ate it and started to play around with his abilities. Then took out his zanpakuto and started swinging it.

Yamamoto: "I have the experience of the original Yamamoto so this sword is basically like an extra limb and my swordsmanship is already at mastery. I still have to unlock my bankai and shikai though.I need to train is my devil fruit and keep at my body as well."

Yamamoto: "Rodan come let's find some animals to hunt."

Rodan bent down so he could jump on his back then took off into the air. Rodan has grown to 25 meters with a 75 meter wingspan and can now shoot fire from his mouth.

After a couple hours of flying they find a forest so Rodan lands.

Yamamoto: "Rodan go train and be back he in 5 hours."

Rodan screeches and flies away then Yamamoto heads into the forest. 10 minutes into his walk he runs across a massive ape that's around 20 meters tall.

Yamamoto: "Fire Fist." A huge fist of fire destroyed everything in front of hit and headed towards the ape.

Ape pounded its chest and ran towards the flames pulling its fist back then punching the flames its arm was instantly consumed by fire. The ape started screaming in agony throwing itself around in pain.

Yamamoto pulled out his sword and sliced off its head with one slash.

[3 years later]

During these years Yamamoto mastered his devil fruit but has awakened it yet and trained his body enough to open 2 gates he also was able to unlock his shikai through many hours of meditation with his zanpakuto on his lap.

Rodan has grown to 40 meters with a 120 meter wingspan. Rodan fire armor could now cover his wings.

{Earth Daimyo mansion}

Shirone: "Yama are you ready for the academy ."

Yamamoto: "Yes mother."

Yamamoto walked out the house wearing the original Yamamoto shinigami outfit with a cane. Yamamoto was a meager 4'3 with a slim yet muscular body but wearing his shinigami clothes combined with his skinny body and wooden staff(his zanpakuto) made it look like he was a cripple.