Physiology

In its natural state, Ditto is a gelatinous blob with vestigial facial features. However, it can take the form of anything.

Gender differences

Ditto is a genderless species.

Behavior

Ditto's primary defense mechanism is its ability to rearrange its cellular structure. This permits it to transform into essentially any other physical object. When two Ditto meet in the wild, they will attempt to transform into each other. Ditto is best able to transform into something if it has a model to work from. Although Ditto can transform via memory, it has a tendency to forget important details, particularly with its foe's face.