The Minion's original coin price was 10 when game version 6.4.0 was released on March 13, 2019, but the game makers changed it to 1 coin in version 6.4.1. Later on it was restored back to 10.
In this update, Spring Break special mission was held and the costume was offered in its market.
The costume is inspired by Easter Bunny, the rabbit that carries colored eggs in his basket, candy, and sometimes also toys to the homes of children, according to Georg Franck von Franckenau's "De ovis paschalibus" (About Easter Eggs) in 1682.
It is the first costume to bring distance objective on the Moon, while star count and time were the only objectives that were required until then. Later on, a newer costume Polar Explorer was released and it can be better than Bunny after a certain upgrade level.