squeek

The files of Mario Super Sluggers contain an unused early model of Daisy that has mysterious finger bones inside her hands. All other characters, both used and unused, are completely boneless.

It must be noted that model control points used to rig animations are usually called "bones" in the industry, but those are not themselves modeled, and their visual representation (often as cones or other simple shapes) exists only within the 3D modeling program for the benefit of the designer.

These bones, however, are actually modeled, which is highly unusual for the kind of bones discussed in the above paragraph, and is mostly the case for when literal bones actually need to be seen in-game, such as for cartoony animations of a character's skeleton being visible.

It is speculated that there may have been an oversight during the model export that has assigned a model to the bones. Either way, it is notable if it is an error (especially since it makes them look like actual real-life bones seemingly coincidentally), and highly bizarre if it is on purpose (as nothing explains what kind of purpose having bones only in the hands, and only for Daisy, would have).