I do like the idea of mascots, but truthfully I think they are better done as non-human mascots and need to be simple. I think Japan got this right with Yura-chara[0]. There seems to be a strong preference for non-human characters and when there are human ones, they're still overly simplistic.
Seems like same rule about flags[1]: a child should be able to draw it from memory.
Only Barty seems to fit these conditions.
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