From the Super Mario Wiki
Goodybag, also known as Dancing Jewel or Dancing Jewels, is a Support/Guest character in Itadaki Street DS. Once its card is obtained, the player can summon it on the field for additional help. Goodybags are recurring enemies in the Dragon Quest series since Dragon Quest III. This monster returns in Fortune Street. In that game, it appears for a few turns when the player chooses a Venture Card. It pays the character by the amount displayed on the shop if it lands on the character's shop. This particular Goodybag is called "Gumdrops". Its speech involves alternating between capital letters while repeating some letters, such as "GooooOOOddyY BAag", a dialect also seen in Dragon Quest games.