It is a reference to the Reign of Darkness that was unleashed when Super Paper Mario released.
The series was nearly killed. Everlasting darkness was conjured when the series took a nosedive into tried-and-true gameplay elements and did not risk it with RPG elements.
The Reign of Darkness can only be vanquished when Paper Mario destroys the evil overlord with RPG games!
Kimi wa ne tashika ni ano toki watashi no soba ni ita
Itsudatte itsudatte itsudatte
Sugu yoko de waratteita
Nakushitemo torimodosu kimi wo
I will never leave you







