This is the official September 2020 tier list for USAC. It was voted on by the most achieved tournament victors and the most knowledgeable researchers from the USAC discord server, the center of competitive amiibo.
It should be noted that the Joker and Hero amiibo released soon after this tier list was created: they will be on the October 2020 tier list. Personally, I’d place Hero in A tier and Joker in C+ or B tier.
Special thanks to Lady Cucco for compiling and processing the data! She does an excellent job, and we’re lucky to have her.