After entering a temple or laboratory, Sonic is exposed to an energy pulse that alters his physical form into a female version of the character.

These titles often borrow from standard Sonic platforming but add specific "transformation" milestones:

The story typically involves meeting familiar faces like Tails, Knuckles, and Amy to see how they react to the change. Gameplay Mechanics

Most versions of this scenario center on Sonic encountering a mysterious relic or energy source, such as the .

Players may navigate an island or a "White Space" hub (similar to Sonic Generations ) to access different stages.