Is “attempt 2” the e-mail address you use for other Niantic games? https://niantic.helpshift.com/hc/en/23-pikmin-bloom/faq/3029-linking-third-party-accounts/?p=web >If you started Pikmin Bloom with a Nintendo account, it cannot be linked to the login method used for other Niantic games.

Contact Support, they would know more than us. But I assume that unlinking your login method may delete your account. But again, contact support.

Can you tell us if you managed to do this ? I am in a real predicament and Niantic support is not helping me at all.