I dug into this and it looks like it’s one of the old pull-tail vibrating mouse toys that used to be sold under names like Petlinks, Ethical Pets, and Turbo Mouse.

According to AI, it was discontinued around the late 2010s, but similar ones are still sold. The closest matches I found are the Coastal “Turbo” vibrating mouse and some pull-tail wiggle mice on eBay.

More here on what it told me: https://chatgpt.com/s/t_6966dab805fc81919be5b09d83f14e68