Welcome to this new story. I don't watch the show but I love Spike so much. This story will be about Spike after he goes through a growth spurt. I might add some elements from Ring Fit Adventure. This is a MLP AU where the ponies are anthros. Please enjoy the story.

Disclaimer: I don't own MLP

The Legacy of Dragaux

Prolouge

Equestria was home to many of Mythical Creature. But the one prominent species that inhabits this magic land are the ponies be they Pegasi, Unicorn, Earth Pony or even the majestic Alicorn. But in Ponyville there was one inhabitant that was not a pony at all but a Dragon with Lavender scales that covered his body with bright green spines down his back, Spike was the Dragons name and he was given to the Alicorn Twilight Sparkle as a gift from her mentor Princess Celestia. Spike had been helpful to her as well as many others in Ponyville.

Unknown Location

In the air, you can see a dragon flying in the air, but it wasn't just any dragon. This dragon was buff and looked like it worked out for years. And to note, this Dragon is female. To make things more intresting, she looked like a female version of Spike. The only difference is that she has silver eyes and has light purple scales. She wore a black jumpsuit that hugged her breasts and ass. "All I have to do is find you in Ponyville, then we can finally meet each other, son." The dragon said.

Golden Oak Library

This place is home to Twilight Sparkle and Spike. Right now, Spike was in the kitchen, preparing breakfast for Twilight. Speaking of which, the pony walked into the kitchen. Twilight was in her pjs, which didn't help cover her D-Cup breasts. "Good morning Spike, I see that you've prepared breakfast." Twilight said to her assistant. Spike smiled in response. "Well... I'm just glad to help." Spike only wore his apron. He gave Twilight a plate of bacon and eggs. "As always Spike, your an excellent cook." She starts eating her breakfast. Twilight is the student of Celestia, one day, she'll rule all of Equestria.

Spike already made his own breakfast and joined Twilight at the table. "So Spike...What are you going to do?" Spike looks at Twilight in confusion. "I mean, what are your plans in the future cause there is no way you'll be my assistant forever." "WHAT DO YOU MEAN?" He noticed he was losing his cool in front of Twilight. "I'm sorry Twilight...I didn't mean to lose control of my-" "It's okay Spike!" Twilight quickly calmed Spike. She knew he was emotional and had to be careful with what she said. Spike was already like this because of Rarity.

"Look Spike you've been a wonderful assistant for years and i'm incredibly grateful for all your help, but I want you to have your own destiny. Like your dragon heritage, maybe you can find some traces of your family." And then, Spike immediately had a face of sadness. Spike was hatched by Twilight when she was young and ever since then, he has been taken care of by Princess Celestia and Twilight. He loved his family, but wished he figured out what happened to his real family. "Twilight...I'm not sure if I want to do that, not even Celestia knows what happened to my real parents. I'm just happy your around Twilight. Your my real family."

Suddenly they heard screaming from outside.

"AHH! A dragon is here!"

"Quick, let's get out of here!"

"Run for your lives!"

The siblings looked at each other and knew this needed investigating.

Later...

"All I'm looking for is a dragon who looks like me except smaller and a male! Have you seen him around?!" Called out the angry parent. But to the ponies, she looked like a monster, a well ripped monster.

"Don't eat me!" A pony said while running away.

"Stupid Earth Ponies, when I ask for something, I want an answer! I knew I should've visited the dragons." Complained the dragon.

"Stop right there!" The dragon turned to find a Alicorn with her pjs. "Who are you and why are you causing trouble!?" The dragon snorted in annoyance. "First off, my name is Barb, and second, I'm not causing any trouble, these dumb ponies keep running away from me every time I ask them a question." Twilight sweat drops. "Okay I'll believe that...But why are you in Ponyville?" Barb sighs."I'm looking for my son." Twilight was confused. "Many years ago I laid an egg and was extremely tired. When I woke up, my egg was gone. I spent many years looking for my son."

Now Twilight felt bad for her, all she wanted was to reunite with her family, just like Spike. "What did your son look like?" Asked Twilight. Barb reached to the inside of her breasts to reveal a poster. She gave it to Twilight and her eyes widens. "But...this is-" "TWILIGHT!" No sooner, Twilight's number 1 assistant came here flying. "What's going on Twilight? Why do have a poster of me? Why are the citizens running away and why is that dragon looking at me funny?"

Barb's eyes were filled with tears. She ran to Spike while pushing Twilight out of the way, to give him a bear hug. "My baby, I finally found you." She gave Spike a sad smile. Spike was being crushed and Twilight saw it so she asked her to stop. "I'm sorry sweetie." Spike gave her a thumbs up while in pain. "So...who are you?" Twilight answered that quickly. "I don't know if this is true, but Spike...I think this is your mother." Spike froze. He looked at the dragon and noticed the similarities between him and Barb.

Eventually Spike caved. "Mom...I have a mother. I HAVE A MOTHER!" Spike starting crying, but they were tears of joy. He finally found his real family. But Twilight was a little suspicious. Don't get her wrong, she was really happy for Spike. But its strange, why would his mother appear now? Why not before he even hatched. Judging by her physique, finding Spike would've taken her a few days. So, why did it take her awhile? She would have to ask these questions later.

"Listen Spike, I know I have a lot of explaining to do, but right now, let's just embrace each other." They hugged again and Barb's breast enveloped Spike. Twilight found that amusing though. But was a little jealous when looking at her breast size. 'I wish I had that size, I would make Fluttershy jealous.' Thought the jealous Twilight.

The dragons stopped hugging. "This is the best day ever! Nothing can ruin-Argh!" All of sudden, Spike fell to the ground, moaning in pain. Veins appeared all over his body, even his wings. "Aghhhhhh! It hurts!" Spike roared out. It was unbearable that tears leaked from his eyes. Twilight looked at Spike in fear. "Spike! Don't worry! I'll use my magic to-" "NO!" Twilight turned to Barb. "Don't interfere!" Barb yelled out. "Your son is in pain! If I don't do something! Spike might get hurt or worse!" Twilight couldn't believe it, why the hell won't his mother let her help Spike. She knew there was something wrong with her.

But then, she gave her a smile, a feral smile. "My baby is going through his growth spurt." She pointed to Spike. Twilight sighed and looked to Spike's direction. Now, Twilight's eyes widens. It appeared that Spike was actually growing. His biceps began to bulk up a lot while his scales turned a darker shade of purple. His once pudgy arms became rippled with muscles. His quads were next, they were ballooning until they looked like a body builder's legs. His chest was next. His non existent chest started to form. Then it ballooned until they were firm. He heard some popping sounds. It came from his abs. He grunted for each pop until six hard abs were formed. Because his torso grew, his apron that he wore was torn to pieces. Leaving him naked.

Spike grew white claws on his fingers and toes. He felt extreme pain coming out of his head. Two white horns covered in blood appeared on his head. The horns kept growing and they curved foward. (Dragaux's horns) His tail grew longer and muscular. His tail at the end also changed. (Dragaux's tail) Spike's wing's grew longer and muscular. His jawline changed and it made him more handsome. Spike's spikes grew longer and sharper. His light green scales changed to dark green scales. And finally, Spike's height blew up. Before, he was the littlest dragon in Equestria, now he was a large dragon that looked like he could destroy Ponyville. (Larger and taller than what he looked like in the finale, he's half of Dragaux's height)

Spike's growth spurt finally concluded. Spike took some heavy breaths. The process was exhausting and painful. "What...what happened to me?" Spike asked. Due to his growth spurt, his vocal cords changed, now Spike had a voice of a late teen.

Twilight jaws literally reached the ground. Twilight used to tower Spike, but now the tables have turned. How the hell did Spike grow so much? 'I know this isn't a greed growth, because he hasn't been hoarding again. But... Spike does look handsome. Although I wish he put on some clothes.' Twilight blushed when he saw Spike's long "member" and huge "balls".

Meanwhile Barb was squealing like a little girl. "Ahhhhhhh! My baby is all grown up! I'm so proud! You look just like your father!" She hugged the now large Spike. Now that Spike has grown, he was up to Barb's breasts. Spike just rested his head in his mom's breasts. "Spike? Is that you?" A voice called out.

Both dragons and Twilight turned to the voice of the Princess of Equestria. Celestia you can describe as a gorgeous woman. The woman towered over most ponies. She wore a white elegant dress, which revealed her I-Cup breasts, and she had a golden necklace with the sun. She's also Twilight's teacher and surrogate mother to Spike. She saw that Spike was now taller than her. "What's going on here?"

Chapter End

Author's Notes: Well, things just got awkward. Two mothers met each other. Wonder how that's going to end? Until then, please read and review.