This Rarity Chart would not be possible without the hard work of Shadowtek. Shadowtek created and maintains the Obtainability Chart over on reddit. The Rarity Chart below is merely a reflection of his efforts.
Rarity is indicated on a scale from common (which is the least rare), through to unicorn (which is the most rare). Unknown indicates that the rarity for that particular amiibo within the given region is -as of yet- unknown.
Amiibo where the rarity for both regions is Unknown have been omitted from the overview.