I had maybe too many ideas so I just put them here.
Gameworld: Little Crusaders
Item: Anime Eyes (Dragon Head)
Description: The dragon has anime eyes.
In-game: Become Dragon-chan with these eyes.
Gameworld: Ball Race
Item: Banana Ball (Ball Shape)
Description: The ball race ball, but shaped like a banana.
In-game: Very radioactive.
Gameworld: Minigolf
Item: Ball Race Ball (Golf Ball Skin)
Description: Your playermodel in a Ball Race ball. Changing color would only change the colored half of the ball, and your playermodel starts running in the ball when you putt it. Ball Race upgrades could also maybe work with this.
In-game: It’s Ball Race, but not!
Gameworld: Minigolf
Item: Mushroom Cloud (HIO Effect)
Description: A large mushroom cloud.
In-game: Make your golf ball an atomic bomb.
Gameworld: Ball Race
Item: Survivor’s Shield (Ball Shape)
Description: The Survivor’s shield from ZM (the orange sphere combo power).
In-game: Kill zombies and race at the same time! Wow!
Gameworld: Virus
Item: Sawed Off Shotgun (Double Barrel Skin)
Description: A sawed off double barrel shotgun.
In-game: Replace your double barrel with a shorter one.
Gameworld: Little Crusaders
Item: Barbecue Outfit (Armor Skin)
Description: Turns the knights’ shirt into a Hawaiian flower shirt with an apron, shirt color changes with rank. The knight is always holding a barbecue stick (wouldn’t show up in first person). When you turn into a count, the apron goes on backwards (replaces the cape).
In-game: Kiss the cook.
Gameworld: Little Crusaders
Item: Wind-Up Key (Button Skin)
Description: Turns the dragon’s button into a blue wind-up key (similar to the concept art).
In-game: (I can’t think of a good description for this one)
Gameworld: Little Crusaders
Item: Pig Mask (Knight Helmet)
Description: A mask of a pig (like a birthday mask) put on the knight’s helmet.
In-game: Wow, a real Pigmask!
Gameworld: Minigolf
Item: Bowling Ball (Golf Ball Skin)
Description: Replaces the golf ball with a bowling ball. It would use the bowling ball you use in the plaza too (if you use a plasma bowling ball in plaza it would be plasma in golf too).
In-game: Strike!
Gameworld: Little Crusaders
Item: Fancy Ghost (Ghost Hat)
Description: Gives the ghost a top hat and a monocle.
In-game: This ghost is so fancy they would drink wine, if it didn’t fall through them.
Gameworld: Virus
Item: Mini-Nuke (TNT Skin)
Description: A small nuke that explodes into a mushroom cloud when an infected walks on it.
In-game: So that’s why the infected are green.