Nintendo's privacy policy is 41 paragraphs and does not use the words "train", "AI" or "machine learning" once. Whether your play, voice chat or purchases train anything…
Paste this where the card should sit. It is the live verdict: if the grade changes, the card changes. It loads nothing from anywhere but this site and sets no cookie.
Editors that support oEmbed (WordPress, Ghost, Substack and most newsroom systems) can paste the entry's address instead, https://isittrainingonme.com/app/nintendo/, and get the same card.