The red one pictured, I just got in the mail, and is about 50% smaller than original Bikkuriman keshi. I have no idea what it’s from.
The painted one is from the boxed Bikkuriman 2000 Fuundameshi line. These figures have a triangular cutout in the bottoms to slide on a base, with a slot on the base for a card/sticker to be inserted as background.