The twenty-third episode of Adventures of Sonic the Hedgehog.
Robotnik's program to make him a thousand times smarter is stolen by Hacker the Mole. When Robotnik sends Scratch and Grounder to capture Hacker, Grounder accidentally installs the Genius Chip and becomes smarter, capturing Sonic and overthrowing Robotnik.
This episode provides examples of:
- Affably Evil: When Grounder gains super-intelligence, he also gains a considerable amount of charm to his personality.
- Alliterative Title: Grounder the Genius.
- Badass in Distress: Sonic gets turned to stone by Grounder's petrifying ray, leaving Tails and Hacker to come to Robotnik's fortress and rescue Sonic.
- Be the Ball: When Robotnik tries to turn Grounder off, only to electrocute himself because Grounder disconnected his "OFF" switch, Grounder punishes Robotnik by having Scratch bounce him around like a basketball, then later kick him like a football.
- Cape Snag: When Robotnik attempts to escape from his own dungeon, Sonic slams the door on him, and Robotnik's cape gets caught in the door latch.
- Cranial Eruption: Happens to Grounder after he puts the Genius Chip in his head.
- A Day in the Limelight: This episode focuses primarily on Grounder.
- Didn't See That Coming: Sonic tries to trick Grounder into holding an explosive disguised as a trophy, but Grounder tosses it aside when he makes out the explosive. He then boasts to Sonic about how he thought of every possible occurence, when Scratch, thinking the fortress is under attack, rushes out to aid Grounder and trips on the explosive, causing Grounder to lose his head. Grounder admits that he didn't predict this outcome, and comes to the conclusion that not even a genius can predict everything.
- The Dog Bites Back: Robotnik's constant abuse bits him in the posterior when Grounder starts moving up in things, where he sees through his transparent attempts at flattery because, uh, he's berated him with various demeaning insults for the whole show until today; therefore, the idea of "partners" becomes Grounder as the sole future ruler of Mobius and Robotnik thrown in the dungeon.
- "Flowers for Algernon" Syndrome: Grounder becomes a thousand times smarter as a result of installing the Genius Chip.
- High-Class Glass: When he becomes smarter, Grounder starts wearing a monocole on hisright eye.
- Improvised Lightning Rod: A variant; in this episode's third act, Grounder invents a lightning rod to stop Sonic, Tails, and Hacker from escaping from Robotnik's fortress. When Hacker asks Grounder if somebody already invented the lightning rod, Grounder tells him that his lightning rod doesn't protect against lightning; it causes it!
- Insufferable Genius: Grounder becomes this after he installs the Genius Chip, though does manage to reach an epiphany at the end when Scratch in trying to help him, foils his plans, realizing even a genius cannot predict everything.
- Literal-Minded: Early in the episode, when Scratch and Grounder set a trap to catch Sonic, Scratch tells Grounder, "All right, put out the bait!". Grounder pulls out a giant worm upon hearing this.
- Losing Your Head: Grounder's head keeps coming off his body, which results in Grounder installing the Genius Chip, and later, Scratch inadvertently foiling Grounder's plan for world domination.
- Mouse Trap: Near the beginning of this episode, Scratch and Grounder use a giant mousetrap to try to catch Sonic, using a doll of Tails as bait. After Sonic traps dolls of them in the trap, Scratch and Grounder reveal a giant Bear Trap underneath, which Sonic is quick enough to avoid, but they aren't when it falls on them.
- Mythology Gag:
- When Hacker hacks into Robotnik's computer to download his super-genius program, the actual "Jump" and "Ring" sound effects from Sonic the Hedgehog 1 are used.
- Scratch and Grounder blow up Hacker's house with a cannon with legs that explodes after a single use, much like the Bomb enemy in Sonic 1.
- No Plans, No Prototype, No Backup: The Genius Chip that Robotnik was researching had only a one-in-a-million chance of being successfully created. Once that one was inevitably destroyed, his computer informed him that he'd be once again subject to that probability if he were to try to recreate it.
- Paper-Thin Disguise: Sonic disguises himself as a chip recycler, and later, an award presenter to try to extract the Genius Chip. Unfortunately, due to Grounder's enhanced intelligence, he is able to see through Sonic's disguises and anticipate his plans. The first time, Grounder petrifies Sonic, and the second time, he makes out the explosive disguised as a trophy and tosses it away before anything bad happens (at least until Scratch trips on it).
- Smart People Speak the Queen's English: When Grounder installs the Genius Chip, his usual Simpleton Voice changes to Received Pronunciation.
- Stupidity-Inducing Attack: Hacker reveals to Sonic and Tails that in addition to the Genius Chip, he also created a Stupid Chip that makes whoever uses it only half as smart as they are. Sonic uses this on Robotnik near the end of the episode, resulting in Robotnik picking up the explosive disguised as a trophy and Grounder's lightning rod zapping it.
- Taken for Granite: At the end of this episode's first act, Grounder uses his petrifying ray to turn Sonic to stone. Tails and Hacker make their way to Robotnik's fortress and hack into the ray gun's technology to reverse the effects and save Sonic.
- Turned Against Their Masters: When Grounder becomes smarter, he openly questions his allegiance to Robotnik and tries to rule Mobius by himself.
- X-Ray Sparks: Happens to Robotnik when he tries to turn Grounder off, only to find out that Grounder had anticipated this and disconnected his "OFF" switch.