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.
In the Oil Ocean episode, the zone starts out with a parody of the old MGM cartoon opening titles (for a cartoon called Oil Ocean Follies). And then you see the hilarious pictures of Sonic and Tails that ensue.
The story of "Failure Cresh", a baby with a Ring monitor for a head, interrupting the gameplay.
The a capella version of the Mystic Cave Zone theme.
Game Breaker: Knuckles is broken beyond belief, able to clear entire stages by just leaping into orbit and summoning the bazooka-toting police officer from Streets of Rage to One-Hit Kill bosses. Fortunately, there's a cheat code to Nerf him and make the game more fair.