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Super Mario 64 / Super Mario 64 DS
In Super Mario 64 and Super Mario 64 DS, they are seen only in the ninth course, Dire, Dire Docks. When Mario swims through a bubble ring, it will replenish two wedges of his health meter, and a number will appear above Mario. This number represents the amount of bubble rings Mario has passed through. When Mario swims through five bubble rings, he will be granted with a Power Star.
Bubble rings were required for Stars 4 and 5 in Dire, Dire Docks. In Star 4, "Through the Jet Stream", Mario must swim to the other side of the tunnel to find a jet stream spraying out bubble rings. After Mario collects five of these bubble rings, a Power Star appears above the jet stream that Metal Mario can collect. In Star 5, "The Manta Ray's Reward", Mario will find a Manta Ray swimming around underwater and leaving a trail of bubble rings. Mario must follow this trail to collect five bubble rings and make the Power Star appear.
Mario Party 4
In the Mario Party 4 minigame Manta Rings, rings appear along with a gold type created by a Manta. The blue rings are worth one point and the gold rings are worth three points. In this appearance, the rings are composed of bubbles.
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