Bubble Blastoff

First, you must defeat the Undergrunt Gunner who is guarding the cannon. Spin attack nearby coconuts and hit his machine three times to defeat him. Watch out for Crabbers and the bubbles he shoots, which can make you float away.

After defeating the Undergrunt Gunner, use the cannon to travel to the Octoguys' planet. You can choose to fight them or not. Grab the Fire Flower and use the Sling Star to return to the starting planet.

Back on the beach, run to the gate and shoot the three beacons with fire to light them. You have a limited time, so be quick. If your Fire Flower power runs out, you can make a second trip to get another.

Once the three beacons are lit, an Ice Flower will spawn. Use the Ice Flower to cross the lake, then jump up the water spouts to reach the pole.

Climb the pole to a higher platform. Move left and use the swing poles to reach another platform. Jump onto the moving platform to grab the Golden ? Coin.

The platform will disappear. Quickly use the surrounding Sling Stars.

Next, use a series of Bubble Blasters to ascend. You will encounter fire shooters and a Magikoopa. The final Bubble Blaster will transport you to a small Cheep Cheep planet.

On the Cheep Cheep planet, avoid the jumping Cheep Cheeps. Groundpound the three tree stumps to activate the Bubble Blaster.

Jump into one of the bubbles from the activated Bubble Blaster to reach the next planet.

On Watermelon Planet, groundpound the tennis balls into the watermelon. Avoid the laser rings while doing so.

After groundpounding the watermelon three times, it will grow large and burst from its casing, revealing a Power Star.