Knuckles' Chaotix: Part 14: Techno Tower Act 5 (+ Boss)
Before reaching the boss of this level, I have my team ride in a drilling machine.
The catch is, I used this ride while the team was swapped around in a temporary powerup. When this swap wears off during the ride, your team ends up getting really bizarre colors! Knuckles turns into the "Wechnia" "character", for example! He keeps all of his moves, though.
This glitch wears off if you enter a Special or Bonus Stage, beat the Act or use another Swap powerup, so I try to bring it all the way to boss.
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For Techno Tower's boss, a dome is brought to the tower's peak, and then you're brought into it to face Eggman in another one of his dastardly contraptions.
The ring core is in plain sight in this machine. Smash it up while avoid all of Eggman's wacky attacks, such has the red and white hands, and the lasers that pass through the floating golden diamonds.
After this boss, one more Attraction/Zone to go for this game!