"Goku its weird how earth has changed huh?" King kai asked his pupil slash friend
"Ya I mean how do they have their own other world?" Goku asked chewing on some food
"Goku i've tolled you this a thousand times already." King kai complained
"I'm sorry King Kai but I need you to remind me."
"Alright." King Kai then started to explain "King Yemma was getting so overflowed with spirts from that world so he made these god who were actually the earth and the sky then the earth destroyed everything thinking that everyone was trying to destroy her. Then the earth and the sky had children and the mother earth told her son Kronos to kill his father-"
"What!" Goku yelled "Why would the Mother earth be so evil."
"No one knows but then when Kronos had children, fearing that his children would do the same to him that he did to his father he eat the-"
"That's disgusting why would he do that."
"To stop them from overthrowing him but anyway they couldnt die because they were all immortal so thats why he ate them. Well anyway they must have givin him indagestion." King Kai said craking one of his little jokes and strated laughing and snorting
"So Kronoses wife hid her last born and youngest Zues from him wanting to protect her baby but Later when Zues was older Kronos found out but Zues convined him that he understood why Kronos did what he did and didnt blame him for it, so Zues was going to serve wine to Kronos but poisend it and when he drank it he got sick and threw up Zues's brothers and sister's."
"That's horrible." Goku said but was still eating
"Then a war broke out and Zues and his family won so they have ruled sense then." King Kai finshed explaining
"Wow hey King Kai how long has it been sense i've been on earth."
"Gosh a pretty long time I'd say about more then six billion years.'
"Well i've decieded I'm going back." Goku said tighting his belt on his gi
"Goku if you go back the dragon balls will go back with you." King Kai said a little surprised
"I know but it's been like six billion years it will be fine." Goku said
"Fine but just to tell you if you die then the dragon ball's will turn to stone just like when it happened with piccolo
"Well im off see you King Kai." he said
"The gods sometimes go to the surface and have children with mortals there called demigods half human half god."
"Oh and one more thing the gods, humans and Demigods have no idea how to use energy but the gods can do this thing were they convert there energy without knowing it and turns there whole body into a solar flare except pepole who arent strong enough die instatly but sense the humans have no idea about energy no human or Demigod has survived it."
"Oh ok well se you King Kai!" Goku shouted before instatly disappering
Sorry guys it was so short but anyway as for Gokus apperance he has his blue gi he wore for the tournament he found Uub in and he wears the potara earings because he is now helping King kai with the whole west kai thing but has more authority then elder kai and the supreme kai.
I dont own Percy jackson or Dragon ball z