At the hotel,how do you get the pineapple to give to yoshi?

Sirena Beach - Episode 3: Mysterious Hotel Delfino

Once you're in the hotel - go to the back left corner and enter the washroom. Go to the last stall and jump up through the water in the ceiling to appear in the tub of the room upstairs. Go around the wall and spray the painting to reveal a Boo.

Now you can jump through the painting into the next room. From there - go to the other end of the room - you will see 4 closet doors - each has a portion of a Boo picture spread across them. Spray them until the complete Boo side is exposed - then you can enter the next room. Spray the pink Boos and then jump onto them and you'll see a square hole in the ceiling.

Jump through it - which happens to be a missing tile in the floor upstairs. Spray the bookshelf and walk through it. Step onto the odd coloured tile to fall into the room below. There - break a crate and take a PINEAPPLE. Now - go through the door out of the room. Use the stairs to get back to the lobby. Take the pineapple to the Yoshi egg by the counter and it'll hatch. Jump on Yoshi and head up all of the stairs to the top floor. Yoshi can eat the Boos for coins - so that'll help you when navigating the halls up there. On the top floor - go to the back corner next to the pool with the Shine in it. Go through the open door into that room.

Jump on the bed and go through the ceiling into the attic. From where you start off - go up the path not blocked by a Boo. At the intersection - take the path opposite of the sleeping Boo. Eat the next sleeping Boo that you come across and go around the corner that it blocked. Head straight and take the second left to find 2 sleeping Boos - one on each side.

Eat the one on the left and follow that path to an area with 4 coins. Ground Pound the cracked tile to fall into the pool room below. Take that Shine!