Japan times availability (do the math based on where you reside): August 5 (12:00) ~ August 11 (18:00)
Seems like Captain Toad for Switch is free for a week (5 Aug to 12 Aug), provided that you have access to a Japanese account to download the game, plus have an active Nintendo Switch Online subscription. I do not know the specifics like if you need to sign in with a Japanese account even though the NSO subscription is non-Japan, but since the Switch is region-free, it should not be an issue.
I would likely take advantage of this privilege by basically rushing through the game, since I am yet to play the new Odyssey-based levels. Unfortunately I don't have a Wedding Mario/Peach/Bowser amiibo so I can't unlock those levels immediately.
I don't think the DLC levels are available, which is a shame.
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Also, Mario Tennis Aces is free for a week for a similar time frame for Europe, Australia and from what I heard, North America also. It also requires Nintendo Switch Online so it's not completely free.
Thank you for reading.
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