Railroad Wrath is the boss level from Inkwell Isle Three. It is unlocked via completion of all the platforming levels and boss levels from World 3 and its own completion unlocks the path to Inkwell Hell.
- There might be Yoki references, although it may be pure coincidence
- Blind Specter has eyes on his hands and may be referencing a Tenome.dfaf
- T-Bone is probably a reference to a Gashadokuro, a Yokai who crushes victims with its hands or eating people's head. T-Bone exactly tries to crush you with his hands, and is also a huge skeleton.
- Blaze Brothers is unknown, probably an Oboroguma.