Stimpy, demonstrating more intelligence than usual, goes on a spree of creating useless and impractical inventions, and subjects Ren to each one.

Stimpy spends a long time at his laboratory, utilizing machinery and animals for his work while rehydrating himself with tears stored in his glasses.

Ren wakes up in a bedroom decorated like that of a child, his eyes bloodshot as he is perpetually pushed to his limits.

[2] Camp later stated that Kricfalusi "fell in love with the idea, that he constantly refined everything in it to the point of ridiculousness, until everything was perfect".

[2] The executives at Nickelodeon greatly disliked the concept of the story and were not motivated to approve it, as they felt it to be inappropriate for children.

[4] In a 2008 interview, Kricfalusi claimed: "I literally had to beg Vanessa [Coffey] to let me put 'Stimpy's Invention' into production.

[4] The animators who worked on the episode have stated that it was Kricfalusi's obsessive perfectionism and micro-management leadership style that delayed the production.

It was my drawings coupled with John being fanatical about this cartoon and not letting up on any point, beating everybody to death to get perfection".

[12] Koenigsberg stated that Kricfalusi had gone "a little bit nuts" by the fall of 1991 as he started to redraw scenes that already been sent to the Carbunkle studio, a practice that brought production to "a complete halt".

[12] By November 1991, Howard Baker had resigned as the overseas supervisor and Jaques was hired to go to the Philippines to oversee the inking of the episode by Fil-Cartoons at Manila.

[15] Jaques, who disliked the task of overseeing production in various Asian studios whose poorly paid cartoonists usually had a level of craftsmanship that was not up to American standards, at first refused Kricfalusi's request to work as the overseas supervisor.

[16] Jaques decided to go to the Philippines before he saw how the drafts of "Fire Dogs" had been vandalized by the staff of the Fil-Cartoons studio.

[16] When Jaques arrived in Manila in November 1991, he reported that much of the footage had been ruined due to incompetence, and he had to redo much of the episode himself using the original pencil drawings.

[15] American scholar Thad Komorowski wrote that Fil-Cartoons was the animation equivalent of a sweatshop as many of the Fil-Cartoons cartoonists slept outside of the studio as they were unable to pay rent owing to their extremely low wages and the studio had no toilet paper in its washrooms out of the fear that the employees might steal it; he compared its performance unfavorably to Lacewood Productions, another animation studio they hired with similarly abysmal working conditions and performance, though Kricfalusi did not disapprove of its work.

[15] Jaques reported that the Filipino cartoonists of Fil-Cartoons were inept and that many of the visual flaws in "Stimpy's Invention" was due to their poor workmanship.

[16] To save time, Jaques used the workprint rather the negative for the scene where Ren cleans Stimpy's filthy underwear, which was the reason for the dirt lines that appeared in the final version.

[16] Jaques reported that the cartoonists of Fil-Cartoons sabotaged much of the drawings of "Stimpy's Invention" out of anger as he showed them American animation methods much superior to their own.

[19] American scholar Thad Komorowski gave the episode five out of five stars, considering it to be among the best of the series with "an ideal balance of genuine turmoil with uproarious comedy".

[19] The American journalist Joey Anuff wrote that "Stimpy's Invention" was Kricfalusi's "finest moment".

[21] She further noted that "the psychotic rant by the Burl Ives-esque singer Stinky Wizzleteats is actually dialogue spoken by Ives in the film The Big Country".

[21] The American scholar Sarah Banet-Weiser wrote that "Stimpy's Invention", when it premiered in 1992, was a refreshing change from the banal and bland cartoons of the 1980s.

[22] Banet-Weiser wrote that much of the dialogue in "Stimpy's Invention", such as Ren's threat "You filthy swine, I will kill you!

[22] Much of the story of "Stimpy's Invention" is a parody of the idea popular in certain quarters that being perpetually happy should be the norm for everyone.

[22] Likewise, the story satirizes the belief that any form of sadness is a mental disorder that needs to be whisked away via a regime of drugs and therapy.

[2] Komorowski noted that Ren under the control of the Happy Helmet was being "tortured, physically and mentally" while Stimpy was completely "oblivious" to the pain that he had inflicted on him.

[25] Banet-Weiser noted that Ren under the dominance of the Happy Helmet has an unnaturally wide, crazed smile perpetually stuck on his face with bloodshot eyes while he attends happily to Stimpy's utterly repulsive desideratum of needs such as cleaning Stimpy's filthy litterbox and his equally filthy underwear.