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>Pocket Monsters Encyclopedia says Porygon was created in 1995
>SM, released for the 20 anniversary, says Porygon was created with technology from 20 years ago, meaning it would take place in 2015 or so
>SM concept art says Grimsely last appearance was 2 years ago (so around 2013), and the famous timeline tweet says BW2 is parallel to XY (released in 2013)
Gen 1 (and gen 3 by association) took place in 1995-1996, matching the release date.
Gen 2 (and gen 4 by association) took place in 1999-2000, matching the release date.
Gen 5 first game took place in 2009-2010, matching the release date.
Gen 5 second game and gen 6 took place in 2012-2013, matching the release dates.
Gen 7 took place in 2015-2016 like its release date.
Gen 8 and gen 9 must take place in 2019-2020 and 2022-2023 respectively.
Prove me wrong (with actual evidence, not headcanon).