Pikachu valve stem cap for car tyres or bicycle tyres (or tires if you're American!).
These need to be printed with a 0.2mm nozzle and they need support! Leave the threshold angle at 30 degrees, as you need some support on the ears and the arms. I added a 10mm brim as it was struggling to adhere to the bed, even when I washed it thoroughly.
It prints in single colour. My painting skills aren't amazing, but I think he looks cute!