Jay was born in the 22nd century. His father was the current Flash, his
mom died shortly after
his younger brothers(Wally Allen II) birth. She had died in a bank
robbery while dad Alan, was busy with a supervillan. After
that young Jay grew obsessed with tapping into the speed force to
no avail. Several years later, while trying out for the
track team (Jay was fast for normals but a slow poke for Allens) he
heard that his dad was in trouble against Water Wizard
near a floating city in the Atlantic.
Jay, swore that Wally would not lose both his parents and started
running like nobody's business. He was at the coast before
he knew it, and from his readings he knew if he was fast enough he
could
run on water. So he poured even more on and.... of
course, joined the speed force. He wasn't nearly ready and so he ended
up bouncing off it, but he speed was so great that he
ended up several hundred years tooo late....
Remembering that his many great grand-pa Barry and Unk Wally could time
travel- he even heard of the story of how Wally time traveled backwards
due to his love of Auntie Linda. However the more he tries the longer
the gaps in time, till he gets to the 30th century.
At this point he realizes it is useless and visits the Flash Museum for
the first time since he started bouncing. His sees what horrible
dis-repair it’s in and decides to find out what
happened to his brother-whom he figured would carry on the lineage even
if he never returned. Upon getting a translator unit, and hearing about
the Legion and XS, he realizes that she was alluded to in Iris’ book
and
he should start the family name again.
So he tries to join the Legion under the rarely used moniker of Kid
Flash.
Jay got the robot custodians of the Flash Museum to help him create his
own Kid Flash custom before trying out for the Legion. Based mostly on
the First Kid Flash uniform, it also has the yellow lightning bolts on
the legs like Kid Flash II. He also added goggles. They are in the Kid
Flash yellow and red, and resemble Cyclops( of the X-men) goggles- save
for the fact that the opening in front is larger, so that people can see his eyes.
Also the goggles being made in the 31st century are polarized so that
Jay's vision is not tinted.
Turned down, due to his inexperience, he is a recent enrolee at the Legion Academy on Montauk Point.