Sonic World Adventure Rush is a fanfic project by Chris Gammon, who was one of the cabal of writers in The Otherworld Anthology.The story details Sonic the Hedgehog and his friends and enemies, on their greatest adventure. The project seeks to merge all of the previous depictions of the titular characters as portrayed throughout various media. But rather than be an Adaptation Distillation, it tries to serve more as a continuation while merging everything else into a Grand Unified Timeline. It works In Theory depending on how familiar you are with the other mediums in which he appeared.
Sonic World Adventure Rush contains examples of:
Affably Evil - Dr. Eggman qualifies as this in the story. While he has done bad things in the past, the enemies resurfacing now are far more evil than he is.
A Day In The Life - Chapter Sixteen paints Nack the Weasel, Bean the Dynamite, and Bark the Polar Bear as the mercenary counterpart to Team Chaotix.
A.I. Is a Crapshoot - The Brotherhood of Metallix, a group of robotic duplicates of Sonic and his friends who are tired of failure and figure the best way to defeat Sonic is to not destroy him, but everything and everyone around him.
All There in the Manual - The story is written in a manner that assumes those that read it are familiar with the mythos enough so as to avoid pages and pages of needless exposition. Of course, a trip to the TV Tropes page can glean enough research that newcomers to the story (or to the series as a whole) have the ability to catch up.
Ambiguously Gay - The author implies Mephiles is this, judging by his mannerisms and dialogue in Sonic the Hedgehog. It doesn't help that some variations of the Faust legend depict his namesake as a genderless lover to Satan.
Not to mention all the Alternate Character Interpretation his namesake suffers on his own, which the author plays up with Mephiles, leaving it ambiguous as to exactly what he is.
Ascended Extra - Nazo. He originally started out as a prototype screen shot for the then-upcoming cartoon Sonic X. His image was labeled as Nazo.jpg. ("Nazo" is Japanese for "mystery".) When the cartoon finally aired, no sign of this Nazo was seen. Some speculate it was Hyper Sonic, while other fan works have painted him as an omnicidal villain.
Entire levels and concepts scrapped from the games, as well as old Dreamcast Sonic Adventure DLC, make appearances.
The idea of an Emerald Coast style resort in Green Hill Zone is derived from beta screen shots that depict Green Hill at night, a giant Welcome sign◊, and an area in the background that looks like white cliffs◊, but assumed to be a resort complex.
Ashura, a well known palette glitch from Sonic 2, makes an appearance as a mysterious advice giver.
Ascended Meme - Though he's not covered in blood or speaking in demonic tongues, Tails Doll is hinted at several times to be "different" from the other Brotherhood of Metallix members... in more ways than one.
It could be that since his red gem is a crude prototype of artificial Chaos Emerald energy, the sheer amount of radiation it emits could drive anyone insane enough to believe Tails Doll is demonic.
Beach Episode - Sonic and Tails' adventure begins with the duo vacationing on the beaches of South Island, and dressed accordingly. It also somewhat serves to show that they don't suffer from Invisible Anatomy.
You Have to Believe Me - Rouge overheard Westwood conversing with his cabal about his involvement with certain situations in the past. Subverted in the fact she knows no one will believe her, so has to stop it herself.