[citation needed] In 1994, he created Earthworm Jim, the character that would star in Shiny Entertainment's video game, toy line, and cartoon series.

[6] Towards the end of the 2000s, he also created two shorts for Frederator Studios and Nicktoons, "Solomon Fix" (computer generated 3D) and "Squirly Town" (traditional 2D).

[7] As a graphic artist and cartoonist, TenNapel released his first comic book in 1998: Gear, a surreal epic based on his real-life cats, Simon, Waffle, Gordon and Mr. Black, in a war against dogs and insects using giant robots as weapons.

[10] Between January and October 2009, TenNapel was a regular contributor to Breitbart News' "Big Hollywood" section, covering topics from movie reviews and the state of the comics entertainment industry to criticisms of the Obama administration and the environmental movement.

based on a character by Shoko Nakagawa (who appears in the films), and starring John Soares and Brooke Brodack.

[citation needed] TenNapel has used Kickstarter to produce a bound collection of his sketches, named Sketchbook Archives.

In 2018, TenNapel self-published the graphic novel Bigfoot Bill, launched as an Indiegogo, successfully funded and reaching various stretch goals.

[24][25][26][27] He has dismissed this criticism, and has written that "transphobe (like homophobe) is a made-up word used to slander conservative people of faith with a mental condition, and is only used by SJWs".

In response, TenNapel tweeted that it is "more important than ever that pro-family comic lovers support my work", stating his belief that LGBTQ people are waging a "culture war" against him.

[29] TenNapel supported Donald Trump's presidency and regularly posts his political opinions on various social media platforms.