Shop owner

"Here's a smile for you!"

- Item Shopkeeper

Item Shopkeeper is the keeper of the Item Shop in the Game Boy Advance game Wario Land 4. She takes on an appearance that is closely related to Mr. Game & Watch, having a similar figure and movement. It is believed that the basic shape and idea of this character was slightly redesigned and used in Super Smash Bros. Melee, which features the first official appearance of Mr. Game & Watch. However, the main difference between the two cameos is the character has eyes in Wario Land 4. Her use in the game is to sell Wario items, which can be purchased with Frog Medals. These items can be used to assist Wario in defeating a boss by inflicting damage at the battle's beginning.

Item Shopkeeper is actually a being that is transformed from a Black Cat, which is actually Princess Shokora trapped in a feline's body. When Wario travels to the Golden Pyramid after hearing a rumour of Legendary Treasure, he spots the Black Cat at the entrance. He sees the Cat again on many occasions, such as on the main map and in the corridor before a boss battle. When Wario enters this corridor, the Black Cat can be seen running into the Item Shop up ahead. However, if Wario enters the shop, the only other being there apart from himself is the Shopkeeper. When an item is purchased, the shopkeeper will go with Wario to the boss room. There, she will use the purchased item against the targeted boss. Once the damage has been dealt, she will exit the room, leaving Wario to challenge a slightly weaker boss. For some items, the shopkeeper will even transform into various creatures to inflict damage. This applies to the Black Dog, Big Fist, Large Lips and Black Dragon.

Trivia

 * When an item is used against the final boss Golden Diva, instead of Item Shopkeeper leaving the room after the item has been used, she will stay and transform into the Black Cat, which in turn will confront the Golden Diva. The Black Cat will still appear if Wario does not purchase an item, she will just come in later after Wario.
 * The fact that Item Shopkeeper transforms into the Black Cat is the only solid evidence in the game that the two characters are actually the same being.