Can Spiritomb be encountered without a Nintendo Online account?
Spiritomb can be caught in the Crown Tundra DLC. It requires you to speak to 32 trainers online. However, I don't have a Nintendo Online account. Given this, is it possible to encounter Spiritomb by speaking to trainers online or by another method (without trading or transferring from Pokemon Home)?
As mentioned in the question, encountering Spiritomb requires talking to 32 trainers online. You can't encounter Spiritomb without talking to trainers online, which requires a Nintendo Switch Online subscription.