A young man from our world is thrown into the ancient past of the Monster High world with the Energems, plus ones that didn't exist in the shows Canon, and all the dino chargers. He chooses to do what keeper and Xenowing did, give the energems to dinosaur to protect them, and make the dinozords to ensure their safety for when the dinosaurs were gone. When the asteroid that wiped out the dinosaurs came, the MC found himself a cave which was filled crystal beds, which when he entered, completely sealed itself up and putting him in suspended animation until mankind came to be, that that also included monster kind as well. In Egypt, the Pharoah's wife finds the Gold Energem, attacking the likes of Doomwing, somehow in this world, this leads to her running, leaving her loved ones to protect them, years pass and the Queen returns to her kingdom only to find it destroyed by it's people killing her loved ones, her husband and two daughters, Cleo and Nefera. She is struck with great grief from this, but encounters our protagonist, who feels guilty for what he had inadvertently gone to this woman and her family, he gives her the Gold dino charge rangers gear as a means to keep herself safe if she runs into Doomwing again. A few centuries pass and another Energem is found in medieval Transylvania, but bonds to a baby girl named after the lord of the night himself, Draculaura. The purple Energem(I'm not doing the obvious thing cause I think that's to easy to do). With the encounter of Doomwing, the MC arrives and defends the chosen child, even teaming up with Dracula himself. When that is all said and done, the MC asks Dracula to give the currently baby Draculaura(who is currently still human, the black plague has not struck her parents yet) her ranger gear around the twenty first century when Doomwing starts to appear with minions. Now in modern times, the cave the MC had hidden in during Mass extinction event was a hidden part of monster highs underground Catacombs. A few hundred year before, the MC had a romantic relationship with Grace Bloodgood, resulting in a daughter he never met, as he was forced to cut ties to protect her from the dangers Doomwing was bound to bring. The MC has made himself a legendary figure in some points of history, often stopping mass disasters involving human-monster relations, preventing wars, and stopping mass genocide.

Energem holders suggested
Red energem: Main Character (from first chapter, solo until green, Graphite, and Dark energems are found)

Blue energem: Clawd(later chapter)

Pink energem: Howleen(in honor of her pink hair in later movies, around same time as Clawd)

Green Energem: Toralei(the raptor zord has claws, this kitty has claws, fits fine with me, also I dont go by the characters whole color palette)

Graphite Energem: Cleo (she learns about the Energems, as well as where her mother has been, and finds the energem as a way to get close to her mother again, and make her proud, similar to the prince who also had this Energem, it also represents the need to have Cleo grow as a person to be able get down and dirty when needed)

Dark Energem: Twyla Boogieman( I feel she is somewhat under minded by the community, plus it somewhat fits, shes the daughter of a being who gives nightmares as a way keep the balance of fear and bravery, as well as sanity, with one, you cant have the others.)

Aqua Energem: Lagoona (water, just water, plus I find it funny to have the Aussie have the hammer themed zord for some reason)

Gold Energem: Dedyet de Nile(Cleo's mom, still a human)( it gives an idea that I've never seen done, a reason why Cleos mother disappeared, what happened to her, and a reason for Cleo to change and develope into something new)

Black Energem: Ghoulia ( I can see her being the type to be surprisingly good with guns, plus in ranger mode she could maybe speak English and move like her body wasnt dead)

Purple Energem: Draculaura( I feel she is definitely the type to have the Plesio zord)

Silver Energem: Frankie (she would likely feel not very useful to her friends, but would find the energem, but not really realizing it, and rush in head first to help her friends, bond with it)

Now for the new Energems.
Copper(oxygenated green) Energem: Robecca ( motif and zord: prehistoric Shrimp)

Bronze Energem: Clawdeen(motif and zord: Dimorphodon and buzzsaw)

Ruby Energem: Harmony Bloodgood(MC and Grace's daughter) ( motif and Zord: Allomerus(existing zord, super sentai exclusive))