The Potted Ghost's Castle
When the player enters the level, Blue Yoshi will be on the roof of the castle, and Yoshi will go in through a Warp Pipe, right when the Player enters they will find a pit of lava, with some Flatbed Ferries and Podoboos, along with sinking logs. On the far side, Blue Yoshi will find a warp pipe going upwards, after going through Blue Yoshi will be outside again, and it will need to use Arrow Lifts to continue up. The player will then find a dark tunnel through a warp pipe, and the player will need to go through a long area to get a key out of a Pot. After that Blue Yoshi can go the other way in the dark tunnel. The Player will then encounter large spiked blocks being held by chains, the player needs to hit the wheel holding it, to make it go up so the player can get through. After this the Yoshi will get to a door that needs a key.
After going through, Blue Yoshi will find another dark tunnel with some moving platforms. On the far side, the player will need to use Arrow Lifts to go up. After this the player needs to go through a hidden door, they will the find themselves in a jungle-like area, full of Bandits, where the player needs to find a Pot with the key in it to proceed. The player will then be in a large room with lots of pots, and the boss door.
This is one of only two castles in the game to not feature the "Room Before Boss" song, the other being Raphael the Raven's Castle.
Roger the Potted Ghost starts out as a normal flower pot, but then Kamek comes and transforms him into a giant Ghost to try to stop Blue Yoshi. To defeat Roger the Potted Ghost, Blue Yoshi needs to push him off the edge of the platform, however this is made harder by two Shy Guys on the other side, pushing him towards the Player. During the fight he will also spit blue flames at the player, and the player will have to lunge at him, in an attempt to push him away.
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