These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Sonic Rivals
Best Level Ever: Meteor Base, by virtue of not having to race a rival at all and just run through the level old-school style.
Complete Monster: Eggman Nega, even moreso than in the Rush games. He plans to release the Ifrit to destroy the world—and to power the Ifrit up, he was going to feed it Chao.