Timeline sobre mundo de Pokémon:

Time	Details
The beginning of time	
Arceus appears in the darkness in the form of an Egg. After hatching, it creates the universe. (M12)
4,600,000,000 years prior	
Creation of the Pokémon world, as referenced by Bill. (EP013)
2,000,000 years prior	
First Pokémon, as dated by paleontology. (EP163)
The Meteonite enters the planet's atmosphere and breaks up, with the largest fragment impacting into the landmass that would become the Unova region. (BW009)
2,000 years prior	
A war breaks out. Soldiers leave Kanto by ship. (EP020)
A woman dies while waiting for her lover to return at Maiden's Peak, creating a haunted monument. (EP020)
Sir Aaron tries to stop a war. He seals his Lucario in a staff. (M08)
1,000 years prior	
A war breaks out in the form of a clash between the Hero of Truth and Hero of Ideals, pitting Reshiram and Zekrom against each other and resulting in the devastation of the Kingdom of the Vale. (M14)
Using power borrowed from Victini, the King of the People of the Vale moves his castle from the Kingdom of the Vale to the site where Eindoak Town will later be founded, then dies, trapping Victini in the area. (M14)
500 years prior	
The Artificial Pokémon, Magearna, is created by Nikola. (M19)
400 years prior	
Azalea Town experiences a devastating drought that ends when a Slowpoke's yawn brings rain, prompting the town's people to begin a time-honored tradition of respect for all Slowpoke. (EP142)
300 years prior	
The Orange League takes place for the first time. (EP095)
The captain wins the Orange League.
The captain's ship gets caught in a storm and sinks.
300 years prior to JN	
Mt. Chimney experiences a phreatic eruption in the Hoenn region. (JN064)
200 years prior	
Early versions of Poké Balls are used. (EP232)
Lokoko's master, who looks identical to Brock, leaves his home in Johto to go on a journey. His Ninetales is left waiting for his return at his mansion. He never returns. (EP232)
200 years prior to XY	
Lon became a ghost in the "Scary House". (XY072)
100 years prior	
Lokoko's master's Ninetales realizes that its master must be dead by now and tries to leave his mansion, but is unable to, as its Poké Ball remains there. (EP232)
100 years prior to XY	
Hoopa Unbound causes a great clash of Pokémon that nearly destroys Dahara City. (M18)
Ghris creates the Prison Bottle and seals Hoopa's Unbound powers inside it before hiding it. (M18)
55 years prior to SM	
Alola TV starts broadcasting. (SM113)
50 years prior	
Samuel Oak is born. (M04)
Lokoko's master's Ninetales discovers that it has developed mysterious powers. (EP232)
40 years prior	
Samuel Oak goes on his Pokémon journey. (M04)
30 years prior	
Kaiser reports the existence of a Dratini in the Safari Zone. Thousands of people come there to try catching the rare Pokémon, destroying the Safari Zone in the process. Since then, only Safari Balls are allowed to be used there. (EP035)
29 years prior	
Delia is born.
25 years prior	
Jessie is born. (M02)
James is born. (M02)
20 years prior to DP	
Grings Kodai touches the Time Ripple, laying all of Crown City's plant life to waste. Kodai starts to have visions of the future, and Celebi stops visiting Crown City. (M13)
20 years prior to SM	
The Pokémon School is opened. (SM042)
???	
Samuel Oak becomes a Professor.
Delia and Spencer study as students of Professor Oak. (M03)
James is arranged to marry Jessebelle. (EP048)
James runs away from home. (EP048)
Jessie's mother, Miyamoto, is sent on a mission to catch Mew. She vanishes without a trace. (The Birth of Mewtwo)
James catches a Carnivine at the Great Marsh. (DP082)
Daisy is born.
Violet is born.
Lily is born.
Johanna wins the Sinnoh Grand Festival and becomes a Top Coordinator.
15 years prior	
Brock is born.
???	
Tracey is born.
Cilan, Chili, and Cress are born.
Clemont is born.
Kiawe is born.
Mallow is born.
Gladion is born.
Jessie and James enroll in a school called Pokémon Tech. They both drop out shortly after. (EP009)
Jessie and James join a bike gang in Sunnytown. (EP036)
11 years prior to DP	
Paul is born.
10 years prior	
Misty is born. (EP003)
Ash is born. (EP001)
Gary is born. (EP001)
10 years prior to AG	
May is born. (AG001)
10 years prior to DP	
Dawn is born. (DP001)
10 years prior to BW	
Trip is born. (BW001)
10 years prior to XY	
The Lost Hotel is opened. (XY081)
10 years prior to JN	
Goh is born.
Chloe is born.
???	
Forrest is born. The rest of Brock's siblings are born afterwards, apparently each about a year or less apart.
Iris is born.
Serena is born.
Lana is born.
Lillie is born.
Sophocles is born.
7 years prior to AG	
Max is born.
Less than 10 years prior to XY	
Bonnie is born.
5 years prior	
Brock receives his first Pokémon, an Onix, from Flint as a present for his tenth birthday. (AG034)
Molly Hale is born.
4 years prior to SM	
Lillie is nearly abducted by a Nihilego, but she is rescued by a Silvally. The traumatic experience makes her afraid of touching Pokémon. (SM049)
4 years prior to JN	
Goh and Chloe attend a Pokémon Summer Camp hosted by Professor Oak. Ash also signs up for the camp too, but he wakes up late, missing his opportunity to go there. (JN001)
Goh and Chloe encounter Mew, leading to Goh's dream of catching Mew once he became a Trainer. (JN001)
3 years prior to JN	
A Trainer leaves his Gengar at the future site of the Cerise Laboratory, promising to come back for it. He never does so. (JN016)
Goh meets a boy named Horace during a family trip to Azalea Town and becomes friends with him. They explore Ilex Forest together in order to find the Ilex Forest shrine and Celebi, but are unsuccessful. (JN032)
Goh and Horace promise to meet each other the next day to continue their search. However, Horace develops a fever that prevents him from meeting Goh, causing Goh to start believing that Horace lied to him about them being friends. (JN032)
2 years prior to JN	
Horace finds the Ilex Forest shrine and tries to call for Celebi to take him back in time so that he could fulfill his promise to Goh. When Celebi doesn't appear, he leaves a letter for Goh at the shrine, explaining why he couldn't fulfill his promise. (JN032)
Professor Cerise's student Laxton leaves him and starts Laxton Farm. (JN052)
???	
Pikachu is born as a Pichu and raised by a Kangaskhan until its evolution and departure. (JN001)
Pikachu is caught and eventually transferred to Professor Oak's Laboratory. (JN001)
Meowth meets Meowzie. (EP070)
Meowth learns to talk and walk on two legs. (EP070)
Meowth is rejected by Meowzie and joins Team Rocket. (EP070)
Jessie and James join Team Rocket. (HS12)
Jessie receives an Ekans as a chūgen present (birthday present in the dub). (EP017)
James receives a Koffing as an oseibo present (Christmas present in the dub). (EP017)
Brock catches a Geodude.
Flint leaves Pewter City to train, leaving the Pewter Gym in the hands of his oldest son, Brock. (EP005)
Lola leaves Pewter City out of boredom, leaving her children in the hands of her oldest son, Brock. (EP005)
In the dub of EP005, Flint says Lola died at this point, rather than leaving. In subsequent episodes where Lola appears, the dub follows the original with Lola leaving home and leaving everything in Brock's care.
Misty catches Goldeen, Staryu, and Starmie.
Tracey catches Venonat and Marill.
Iris catches a Drilbur, which later evolves into Excadrill and starts disobeying her. (BW033)
Misty leaves Cerulean City to train, leaving the Cerulean Gym in the hands of Daisy, Lily, and Violet. (EP007)
Serena is sent to Pallet Town in Kanto against her will, to attend a summer camp hosted by Professor Oak. She gets lost in a nearby forest, and hurts her knee, where she meets Ash and is rescued and led back to the camp by him. (XY007)
Clemont befriends a Shinx when studying in an academy specializing in Electric-type Pokémon. It later evolves into a Luxio. (XY048)
Mallow's mother catches a Bounsweet and gives it to her daughter. (SM108)
Mallow's mother passes away due to an illness. (SM108)
Lana and Mallow meet each other for the first time. (SM059)
Zoey finds a Glameow in an alleyway of Snowpoint City and raises it with Candice. (DP126)
Cilan, Chili, and Cress become Gym Leaders of the Striaton Gym. They catch their Pansage, Pansear, and Panpour, respectively.
Cilan becomes a licensed A-Class Pokémon Connoisseur.
Clemont becomes Gym Leader of the Lumiose Gym. He catches his Magnemite, Magneton, and Helioptile, which he later evolves into a Heliolisk.
Iris receives a newly hatched Axew from the elder of the Village of Dragons. (BW009)
Alain leaves Sycamore Pokémon Lab, allies with Lysandre, and achieves Mega Evolution with his Charizard. (XYS01 & XYS02)
Mairin starts her Pokémon journey with Chespin, nicknamed Chespie. (XYS01)
Kiawe completes Olivia's grand trial, and receives a Z-Ring and Charizard from his grandfather. (SM002, SM011)
Professor Cerise receives a Yamper from a friend in Galar. It develops a liking to his daughter Chloe, who initially hates it, but she eventually comes to like it. (JN029)
Parker is born.
Ash wins a Pokémon League Expo hat. (EP025)
1 year prior to DP	
Paul turns 10 and begins his Pokémon journey. He chooses Turtwig as his starter. (DP040)
1 year prior to JN	
Professor Amaranth detects powerful Psychic energy on Faraway Island. Suspecting it to originate from Mew, he establishes Project Mew in order to eventually investigate the island and find Mew. (JN133)
Less than 1 year prior	
Ash and Gary find an old Poké Ball while fishing, breaking it in half after arguing who will get it. Each of them keeps one of the pieces as a symbol of their rivalry. (EP269)
Less than 1 year prior to DP	
Paul enters the Kanto, Johto, and Hoenn Leagues, but doesn't win any of them.
Paul catches his Elekid, Murkrow, Weavile, Ninjask, and Chimchar.
Paul's Turtwig evolves into Grotle and then Torterra.
Zoey competes in three Pokémon Contests and wins one of them.
Less than 1 year prior to XY	
Clemont creates Clembot, which ends up driving him and Bonnie out of the Lumiose Gym and taking it over. (XY009)
Clemont catches a Bunnelby. (XY088)
Shauna, Trevor, and Tierno start their Pokémon journeys with Bulbasaur, Charmander, and Squirtle, respectively. (XY039)
Less than 1 year prior to SM	
Lana rescues a Popplio from a group of Team Skull Grunts, and it joins her party. (SM005)