Okay well
The Football is in the Lucky Tama Toys store in the Mall, leaning against the desk;
The Jacket is in Tamagotchi Forever store in the Mall, up on the wall next to the door;
The Hat is in the Chille brochure in the Travel Agency, on the stones;
The Necklace is in the Tamagotchi Forever store in the Mall, on the hat rack;
The Tie is on the Teacher in the School;
The Bag is on the middle counter at the Food Court;
The Banjo is in the Tama Beat store in the Mall, leaning on the wall next to the shelves where Memetchi is;
The Wind Catcher is on top of the Tamagotchi vending machines at the Arcade, behind the Car Racing game;
The Slippers are in the Tamagotchi Forever store in the Mall, leaning on the wall next to the door, under the Jacket;
The Paint Brush is on the shelves at the School.
That's all of them. In order.
Hope I helped.