Welcome to the official Imaginary Friends Co. rarity site. All content is for entertainment purposes only and no guarantee is given as to its accuracy or fitness for any purpose. It is subject to change on a regular basis.

Rarity calculations are similar to those used by many other rarity sites. If you're interested in the theory behind the rarity calculations, this article gives a very good overview.

Each Imaginary Friend is ranked by:

• Assigning a score to each attribute based on the number of other Imaginary Friends with the same value for the attribute. The exact formula is:
  attribute score = number minted / number with same value
• For the rarity calculations, it doesn't matter if an item with the same name is listed as a prop or an extra prop — it is considered to be the same item in either case.
• Attributes with a value of "None" are scored based on the number of other Imaginary Friends that also do not have a value for the attribute, because sometimes not having a particular attribute could be rare!
• All attribute scores are summed to give a total score for the Imaginary Friend.
• All custom Imaginary Friends are given a rank of 1. This is not based on the attributes they possess.
• The rest of the Imaginary Friends are ranked starting at rank 2 for the highest score (rarest) to lowest score (least rare).

The method used here to calculate an Imaginary Friend's rarity based on individual attributes, while good, does have some shortcomings:

• Very rare attributes contribute significantly to the score. This could result in large changes in ranking in the earlier days of the project when some attributes are rare, but may not be as rare as more Imaginary Friends are minted.
• At lower rarity levels, where the bulk of the Imaginary Friends sit, Imaginary Friends can be very different in rank despite having similar scores.
• As the combination of attributes possessed by an Imaginary Friend aren't considered, the algorithm cannot determine the uniqueness or rarity of the Imaginary Friend as a whole. If a particular combination of attributes is considered particular rare and valuable, this may not be reflected in the rarity ranking.
• All the Imaginary Friends look great and are distinctly different regardless of the rarity ranking, so take this with a pinch of salt.