Tails, the 8-year-old fox, was in the nursery, changing the diaper of his newborn baby brother Sonic. Sonic, who was once the older sibling, was now the younger one, thanks to Tails.

Tails was saying, "Guess what, Sonic? You used to be the big brother, but not anymore!" Sonic just stared at Tails, uncomprehending.

Tails continued, "Now, I'm the big brother. You'll be the sidekick, the one who follows me around!" Sonic, still not understanding, simply gurgled.

Days turned into weeks, and weeks into months. Sonic grew, but he was still a baby. Tails, on the other hand, was growing more confident with each passing day.

Tails was enjoying his new role as the leader. He was the one making decisions and Sonic had no choice but to follow.

However, Tails soon realized that being the leader wasn't just about making decisions. It was about taking responsibility and looking after Sonic.

Tails found himself waking up in the middle of the night to feed Sonic, or to change his diaper. It was harder than he'd thought.

Tails also realized that Sonic was not just a follower, but someone who needed his help. He learned to be patient and understanding.

As Sonic grew older, he began to understand Tails' words. He would look at Tails with a puzzled expression, trying to make sense of his brother's words.

Tails, seeing Sonic's confusion, realized that he needed to explain things to Sonic, not just order him around.

Tails started to teach Sonic about the world around them. He showed Sonic how to run, how to jump, and even how to fly.

Sonic was a quick learner. He soon started to follow Tails' instructions. But he also started to develop his own style.

Sonic was fast, much faster than Tails. He had a natural talent for speed. Tails was amazed at Sonic's abilities.

Tails realized that Sonic was not just a follower, but a partner. He was someone who could help Tails in their adventures.

Tails and Sonic became a great team. They went on many adventures together, each one more exciting than the last.

On their adventures, Tails and Sonic had to face many challenges. But they always managed to overcome them, thanks to their teamwork.

Tails realized that being a leader wasn't about being the boss. It was about working together and helping each other out.

Sonic, despite being the younger one, was not just a sidekick. He was an important part of the team. And Tails learned to appreciate that.

Sonic also learned a lot from Tails. He learned about responsibility, about leadership, and about the importance of teamwork.

Sonic and Tails became inseparable. They were not just brothers, but the best of friends. They learned to respect and understand each other.

Tails realized that he had not just become a leader, but a better person. He had learned to care for someone else and to work as a team.

Sonic, despite being the younger one, had also grown. He had learned a lot from Tails and had become a vital part of their adventures.

As they grew older, Sonic and Tails remained close. Their bond grew stronger with each passing day. They were not just brothers, but a team.

Tails had turned Sonic into a baby. But, in doing so, he had given them both a chance to grow, to learn, and to become better.

Sonic was not just a sidekick, but an equal. And Tails was not just a leader, but a friend and a brother. They were a team, and they were ready for any adventure that came their way.