From the Super Mario Wiki
Moneybags are enemies in Super Mario 64. Two appear only in Snowman's Land. They are money purses with their zipper undone along with eyes and feet. At first, they take the form of a regular coin, but when Mario gets near one, it transforms into a purse-shaped creature that hops around. After four hops it somehow flattens up, and they walk on the ground for a few seconds. Defeating them will earn the player five coins a piece. They are also featured in the Super Mario 64 DS remake and in Coincentration, a minigame in the same game.
Moneybags also reappear in New Super Mario Bros. in two levels. Here, in order to defeat one, the player must hit it with six Fireballs, stomp it three times, or using a Mega Mushroom or a Koopa Shell. For the first two ways, it gives one coin for each hit, and a 1-Up Mushroom upon the last, at which it would be defeated. They usually appear in areas with several pits, making it harder to chase the creature by these means. The minigame Coincentration also appears in this game, with more 3D-rendered graphics.
A Moneybag from Super Mario 64.
A Moneybag from Super Mario 64 DS.
A Moneybag as it appears in New Super Mario Bros.
Names in other languages
|Gamaguchi literally means "Toad's mouth", and is Japanese for a wallet that has one large opening, similar to that of a frog or toad's mouth.