Instructions
Bee Mario
Get the "?" coin on the grassy hill, and then get the Bee Mushroom at the waterfall base to become Bee Mario. Don't touch any water in this form or you'll revert to normal.
Fly up the ledges as Bee Mario, and then go through the cave and into the hollow tree trunk. Slide down the slope, and then float up the high platform and across the small ones (avoiding the honey) to reach the Launch Star.
Jump onto a flower stem from the lilypad and use a spin-attack twirl to climb up to the petals. Fly across the petals to the highest flower (avoiding the fountains) for the next Launch Star.
Climb up the honeycombs, flying over the empty portions. Defeat the Piranha Plant near the top to reveal a vine to the Queen Bee.
Grab the Star Chips on the Queen Bee by flying over and grabbing her midsection. The Launch Star they will form is behind her. Take it to reach the top of the planet, where the Toad brigade will give you a Power Star.
Trouble on the Tower
Ground-pound the second stone block on the hill to sprout a vine. Spin up the vine and the next one to reach high ground. Leap across the lilypad, and then use the spring to reach the Sling Star.
Pound the red switch on the next ledge to create a bridge, and then pound the wood switch across the bridge to drop the platform wall. Wall-jump up the shaft and the two wood posts to reach the Launch Star.
Jump from the first strange-shaped planet to the other and take the Sling Star at its other end. Go down the hollow trunk on the next planet and take the wooden walkway at the bottom.
Use the vine swing to reach the highest walkway (or wall-jump to it if you reach a lower one). Pound the red switch to activate the windmill and ride it to the top.
Defeat the Mandibug on top with ground pounds to get the Star. You'll have to take out the smaller one on its back first.
Big Bad Bugaboom
Return to the fountain and jump into one of the bubbles being shot out. Ride the bubble all the way to the huge tree, slide down the pole and get the Bee Mushroom on the lilypad.
Go down the warp pipe and head for the waterfall, avoiding the bubbles. Go through the cave behind the waterfall and take the Launch Star at the tree stump.
Swing up the flowers and use them to launch your way to the land mass with Bugaboom.
Beat Bugaboom with three ground pounds to his back, flying up above to reach him. He'll start flying and dropping bombs after the first time, so climb up the flowers or honeycombs to reach him.