Bulma holding her first Dragon Ball.
The Arushinchu is a Dragon Ball with two stars. It's a name given to the Earth Dragon Ball with two-stars, literally meaning 'two-star-ball'. Bulma discovered this dragon ball in her cellar, prompting her research the dragon balls and learn more about them. This was the beginning of her quest to gather the dragon balls, in which she met Son Goku. Bulma lost possession of the dragon ball when it was taken by Pilaf, and it was scattered by Oolong's wish.