Twilight Sparkle (My Little Pony: Friendship is Magic); via Zecora's potion
Utroms (Teenage Mutant Ninja Turtles); via Oracle Pod
Satoru Fujinuma (Boku Dake ga Inai Machi)
Maxine Caulfield (Life is Strange)
Gloxinia (Nanatsu no Taizai)
Drole (Nanatsu no Taizai)
Zecora's potion (My Little Pony: Friendship is Magic)
Utroms' Oracle Pod (Teenage Mutant Ninja Turtles)
After an incident while traveling off the island, Desmond Hume (Lost) began to travel back and forth from his 1996 and 2004 self.
Through her Connect ability, Ellone (Final Fantasy VIII) can connect with the consciousness of someone she knows, and send their consciousness back in time to experience the events of someone else she knows.
Tikal (Sonic the Hedgehog)
Twilight Sparkle (My Little Pony Friendship is Magic), drank Zecora's potion and her consciousness be send to Princess Celestia and Princess Luna's pasts.
Utroms' Oracle Pod (Teengage Mutant Ninja Turtles 2003 TV series), a gigantic virtual reality machine that can transmit the Utrom's history directly into the minds of anyone who enters a pod.