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The red marks are the days that belong to a previous warning, the yellow marks belong to the days of emission of the direct one, being the only days in which the direct pokémon are emitted. The announcement would be on the 21st, because it coincides with the photo of Junichi Masuda's piano, where the last time was 16 days from its publication to the date of departure of the game (in 2016 he published the photo on the 11th and the game came out on the 27th february) this time the photo was published on March 4, coinciding with the 20th, the most reasonable thing is that it wanted to refer to the 21 as they are the days on Wednesdays in which they warn of a future pokémon direct, this also coincides with the exit of dlc wave 2 Pokkén Tournament DX, which would leave on the 23rd, a day before the pokémon direct where they could take advantage of announcing it for the next day. In conclusion, the direct pokémon will be on 22.