Ornaments, these can be placed anywhere and hold no purpose except for looks. There are meant to be 30 but only 28 have been programmed in. Here they are and how you get them:

Picture Name Description Location
Blue Balloon A Blue Balloon Slateport Market
Blue Brick A Blue Brick to put Dolls on Slateport Market
Blue Tent A Blue Tent to Hide In Trick House (Sapphire)
Breakable Door A Door Capable of Walking through Lilycove Dept. Store (Clear-Out Sale)
Cute TV A Skitty Shaped TV Lilycove Dept. Store (Clear-Out Sale)
Fence Length A Fence to Block Areas Lilycove Dept. Store (Clear-Out Sale)
Fence Width A Fence to Block Areas Lilycove Dept. Store (Clear-Out Sale)
Glass Statue A Replica of a Statue in a Museum Lilycove Museum
Gold Shield A Trophy 100 Wins at the Battle Tower
Mud Ball A Ball of Mud Lilycove Dept. Store (Clear-Out Sale)
Red Balloon A Red Balloon Slateport Market
Red Brick A Brick to Place Dolls On Slateport Market
Red Tent A Tent to Hide In Trick House (Ruby)
Round TV A Seedot Shaped TV Lilycove Dept. Store (Clear-Out Sale)
Sand Ornament A Sand Sculpture that Crumbles when Touched Lilycove Dept. Store (Clear-Out Sale)
Silver Shield A Trophy 50 Wins at the Battle Tower
A Slide A Blue Slide Lilycove Dept. Store (Clear-Out Sale)
Solid Board A Board Used to Cover Holes Lilycove Dept. Store (Clear-Out Sale)
Stand A Walk on-able Stand Lilycove Dept. Store (Clear-Out Sale)
Tire A Black Tire Lilycove Dept. Store (Clear-Out Sale)
TV A TV Lilycove Dept. Store (Clear-Out Sale)
Yellow Balloon A Balloon Slateport Market
Yellow Brick A Brick to Place Dolls On Slateport Market

 
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