"finally a chance to relax" thought Celestia walking through the hallways of Canterlot castle exhausted from yet another day of seemingly endless political discussions. "I should probably tell Twilight about the seventh element of harmony sometime" Celestia told herself before stopping in front of a door that only she knew about.
"Oh well. I guess it does not matter since no one can control its power yet."
When Celestia opened the door she was completely shocked by what she saw. Despite her best attempt to make the last element secure, yet on the other side of the door was a human, A HUMAN. Celestia had no idea how a human had even found their way to Equistria let alone this particular room.
"Who are you and why are you here?" Celestia asked the intruder
"I go by the name Justin. As for why I'm here, well I have no idea. I was in the middle of a bey battle with Ryuga when we were both stunned by a bright flash of light. When I recovered from my surprise I found myself in this room."
"Well that would explain why you ended up in this particular room."
"What do you mean?"
"This room has a bey that was sealed away because nopony could control its wild elemental power. Well however you got here I still have to turn you into a pony so you can live in Equistria without standing out."
"WHAT?"
"I can't let the human world find out that we exist, well not yet anyways. Your world is not yet ready for the knowledge of colorful talking ponies, so you will have to live here."
"Fine with me, all I ask is that when I get turned into a pony is to go by the name Thunder Blaze."
"All right" said Celestia who began to use transformation magic to turn Justin into a pony.
Once the transformation was complete Justin, who was now Thunder Blaze had been turned into an alicorn with a white coat and a fiery colored mane and tail.
"Well this was unexpected." Commented Celestia "We should probably find you a permanent place of residence soon, until then you can use one of the castle's guest rooms." Said Celestia walking off
"Wait, Where exactly is the bey that nopony could control"
"It's located to your right"
When Thunder turned to see the Mysterious Beyblade that was sealed away they felt drawn to it and just knew they had to try battling with it, however, since the bey was sealed inside a crystal they had to leave it sitting there.
"So this is what Ponyville looks like in real-life" Thunder mused
"Hi there, haven't seen you around before"
Turning toward where the voice was coming from Thunder was met by a rainbow haired Pegasis mare
"Name's Rainbow Dash. What's yours?" the mare said
"The names Thunder Blaze"
"Nice to meet you" said Rainbow "By the way you're kind of cute. Care to be in a relationship with me?"
"Why thank you. Sure why not, after all you're kind of cute yourself. However I tend to travel a lot since I'm a Blader."
"not a problem, just let me know ahead of time when you have to travel"
That concludes the backstory of how Thunder ended up in Equistria and met Rainbow Dash