on yoshi's island DS. where is the second key in world 3.4?

Answer 1

Hi, I'm assuming that the key is the same as a 'flower' so I've gone to a walkthrough & copied out the bit about the second flower for you ... if you want to read the whole thing then check out the link down there in the source.

Flower 1
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From the start, head left to the end of the ship. There will be an arrow sign
pointing to the right, and a series of small platforms below it. Drop onto
them, then flutter to the area just below the end of the ship. You will
reveal a hidden winged cloud there; shoot it to get the first Flower.

Flower 2
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Hop back up the platforms and board the giant ship again. Make your way
across the length of the ship, collecting all the coins on the ledges. There
will be three red coins (3) on the ledges to be found. At the middle of the
ship, jump to the highest platform and collect another red coin (4) on the
right side. Then, jump at the highest point to collect the Flower high above.