After meeting the end of his life span, Spike awakens in a new Body, Reincarnated as a Kirin he has one single goal, Figure out away to tell his friends without making them think he/she is crazy
A Human is turned in Spinel and ends up in Equestria
Spinel was just getting use to the way things work in Equestria, then Discord decided to drop one heck of a problem on her lap.
The Immortal Main 6 Spend time with an old Spike
Spike's bed isn't the most comfirtable thing and in an attempt to find a better place to sleep he ends up sleep walking and using his friends as beds to find the most comfortable one.
Igneous Rock and Cloudy Quartz find Spikes egg and raise him as their son. He and the Pie sisters have Sibling related Misadventures
Spike is dragged around by Gabby to find his purpose.
Discord is giving up his role as god of Chaos so he can spend all his time with Fluttershy and picks Spike for the job, Spike uses this to try and get Twilight to treat him as a true equal, and brings a few of his own friends to help him
Starlight, Spike, and Trixie sit back and watch the world burn
Thorax decides the best way to win Spike's heart is to become a Female.
20 years ago Spike left Equestria, and now lives in the frozen north, far away from his home and friends, and in these 20 years Spike has become a pure unadulterated badass.
The Immortal Main 6 spend time with an old Spike
Spitfire accidentally drinks a love potion and fall's head over hoof in love with Spike.
Starlight, Spike, and Trixie sit back and watch the world burn with Sunset
Twilight says goodbye to her last friend