Timeline

These are the events of MF in which they happened.
=== 1500s ===
Pyra & Mythra are created
=== 1974 ===
Incineroar is born 
=== 1982 ===
Pikachu is born.
=== 1998 ===
The events of Tinkatuff And The Quest Of The Missing Walking Wake takes place.
=== 2000 ===
Pikachu graduates high school
=== 2002 ===
Boyfriend, Girlfriend, Salty, Itsumi, and Sky are all born
=== 2003 ===
Pikachu moves away from his family due to drama and moves in with his aunt.
=== 2005 ===
Torracat and Pichu are born
=== 2006 ===
Pika is born
=== 2013 ===
Pikachu joins the police force
=== 2015 ===
Litten is born
=== 2019 ===
Pikachu meets Malibu, Persona, Moonlight, Diamond, Candy Cane, Kirby, Incineroar, Inkling and Ice Climbers.
Pikachu Joins the MF cast
=== 2020 ===
Pikachu meets Lillie, Snowy, and Lusamine
Pikachu blows up the abandoned penitentiary
=== 2021 ===
Pikachu meets Pyra, Mythra, Boyfriend, Girlfriend, Sky, Tricky, Salty