There are a bunch of items that are actively being released on the site that have the tag Retired.

If things like the rift, drills, or the new coin machine are just pulling from the rarity, a bunch of these things is going to lose value pretty quick. Probably should get their rarity changed.

I also know there is a TON of items that the battle admins have as loot that are being given out as random junk prizes that could probably be retagged at challenger loot.

Battle Shop

Millionaire Center

Recycle Shop

Currently in Crystal shop:

Controversial: Tagged as crystal shop items, not currently in the CS

Token Shop items [Item=Festive Yellow Lion Plushie]

Most of these should be reraritized. The battle shop stuff and the MC quill I think they are Artefact, since it's not really loot nor is it limited like loot is. I think the items that aren't currently in the crystal shop staff should decide if they want to keep them as Crystal Shop items or not.

The Recycle shop item should probably be switched to Artifact, as well as the Token Shop items.

Crystal Shop items that aren't currently there, I wouldn't mind them keeping the tag necessarily because they do get brought back multiple times sometimes. Because it should say anyway when you do a shop search that they're not in the shop right now, so you won't get your hopes up.

Also, all of the Horns and Roses items still have the Game Prize rarity, when they should probably be changed to Artifact as well to go with all of the various shops they've been put in.

There are probably some other items in some of the special shops that could use a rarity change since they were added to that shop, but I don't have time to go through them all now and make a list. Maybe I could later on.