Somethings hiding

: Big dead fish hung out to dry, far right of the image.

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? Cactus

: At the back, a cactus sits in its pot by the window.

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? Brush

:In the middle, on the floor, right next to the shelves.

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?Matchbox

: On the round wooden table, just to the left of the plate with pancakes. Between the candle and the yarn.

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? Hat

: Straw hat, by the window. At the top-right of the image.

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? Turtle shell.

:bottom left by the teddy bear's face

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?pine tree

: Behind the little birdhouse at the right.

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? cassette tapes

:Slightly above the box of cokes, between two gameboys.

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? Mega man.

: Megaman stands in the central cubicle, positioned directly beneath the two UFOs, firing at them.

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? Maneki-neko

: Gold one at the top-right of the image next to the bottle of red liquid, whatever it is...😂

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?Flower

: That flower's hitching a ride in that pink bucket conveyor/bucket elevator at the bottom right.

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? Samurai

: On one of the top floors near the table with the map.

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? Sepals

: At the center, there is an engraved floral motif on the metal emblem set against the wooden box.

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? Crab

: Top-center. In the tugboat at the top of the image, there's a lady with a white dress and white hair covering her eyes, and she's holding a plate with what appears to be a crab in it, but I'm not entirely sure, since the picture isn't that clear.

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? Knight

there's a lady with a white dress and white hair covering her eyes, and she's holding a plate with what appears to be a crab in it, but I'm not entirely sure, since the picture isn't that clear.

Yeah, that could be a crab too, but like you said, it's not very clear and I didn't notice it either. The crab I'm referring to is positioned close to the captain wearing the blue uniform, it's tucked near his feet, slightly to the side. It's clearer once you focus on that area, especially compared to the other crab-like shape that was more ambiguous. Still, what you found is valid since it also resembles a crab.

: There are two knights standing side by side on top of the brick wall, positioned near the upper section just above the enclosures. Elevated above the crowd, they're easy to overlook, but you can clearly spot them perched along the outer ledge.

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? Paper Boat