Yoyo's being used in more ways than just a toy.
I've noticed that Killer Yoyo is getting misuse for a yoyo being used as a tool rather than as a weapon. So I decided to make this trope since we have it for some reason.
Indices: Improvised Index and Toy Tropes
Yo-yos are used to do more than just cool tricks in fiction. They can be used as lassos getting the bad guys and capturing objects. They can also be used as swings to go from one location to the next. It might even have magical abilities. See also Killer Yoyo for when they used as melee weapons.