[[WMG: The creators of the virtual reality in ''Anime/DennouCoil'' played ''VideoGame/{{Eversion}}'']]
Think about it. A nice world (the actual virtual reality) and a horrible world populated by [[EldritchAbomination EldritchAbominations]] (the world inside the keyhole and the world accessed by obsolete spaces) exist side by side. You can only inhabit one at a time. You access them through certain points which stand out. Does this sound familiar?
* Dennou Coil pre-dates Eversion by a year.

[[WMG: ''Anime/DennouCoil'' is the futuristic, Japanese parallel to ToonTown.]]
No ''duh'', mon. Seriously, we've got cybernetic pets and creatures [[RogerRabbitEffect interacting with humans]], Cyberspace weapons that can come [[HyperspaceMallet out of nowhere]], and [[strike: magical]] [[SufficientlyAnalyzedMagic computer engineered portals]] that lead into the cybernetic world of Cyberspace.

[[WMG: ''Anime/DennouCoil'' is an AlternateCharacterInterpretation of [[VideoGame/MarioAndLuigiSuperStarSaga Mario & Luigi: Superstar Saga]]]].