Top 10 Western Shows That Would be Shonen if the Genre Applied to Cartoons

As in, cartoons that would fit the bill of being shonen (the teen boy demographic) in the same way shows like Dragon Ball and My Hero Academia are.
The Top Ten
1 Adventure Time Adventure Time is an American animated television series created by Pendleton Ward for Cartoon Network. The series follows the adventures of a boy named Finn (voiced by Jeremy Shada) and his best friend and adoptive brother Jake (voiced by John DiMaggio)—a dog with the magical power to change shape and size at will. Finn and Jake live in the post-apocalyptic Land of Ooo. Throughout the show, they interact with the other main characters Princess Bubblegum (voiced by Hynden Walch), the Ice King (voiced by Tom Kenny), and Marceline the Vampire Queen (voiced by Olivia Olson). The series is based on a short produced for Nicktoons and Frederator Studios' animation incubator series Random! Cartoons. ...read more.

Adventure time is very similar to most shonen anime and Finn is a lot like shonen jump characters.

2 Gravity Falls Gravity Falls is an American animated television series produced by Disney Television Animation that first aired on Disney Channel, and then on Disney XD from June 15, 2012 to February 15, 2016. The series follows the adventures of Dipper Pines and his twin sister Mabel in the fictional town of Gravity ...read more.
3 Regular Show Regular Show is an American animated television series created by J. G. Quintel for Cartoon Network that premiered on September 6, 2010. The series revolves around the lives of two friends, a blue jay named Mordecai and a raccoon named Rigby—both employed as groundskeepers at a local park.

Hmmm, it could be either shonen or seinen but it was aimed at teens so most likely shonen.

4 Avatar: The Last Airbender Avatar: The Last Airbender is an American animated television series that aired for three seasons on Nickelodeon from 2005 to 2008. Avatar: The Last Airbender is set in an Asiatic-like world in which some people are able to manipulate the classical elements by use of psychokinetic variants of Chinese martial arts, known as "bending". This show is often seen as one of the greatest cartoons of all time and is commonly thought to be an anime.

This is a great list.

5 Danny Phantom Danny Phantom is an American animated series created by Butch Hartman for Nickelodeon. It was produced by Billionfold Studios and distributed in Canada by Nelvana, a Canadian animation company. The series follows a teenage boy who, after an accident with an unpredictable portal between the human world ...read more.
6 The Dragon Prince
7 Voltron: Legendary Defender
8 Invader Zim Invader Zim is an American animated television series created by Jhonen Vasquez for Nickelodeon. The series centers on an extraterrestrial named Zim from the planet Irk, and his mission to conquer Earth and enslave the human race along with his malfunctioning robot servant GIR.
9 The Loud House The Loud House is an American animated television series created by Chris Savino for Nickelodeon. The series revolves around the chaotic suburban everyday life of a boy named Lincoln Loud and his ten sisters, to which he survives as the middle child and only son in a large family of eleven children. ...read more.
10 The Legend of Korra The Legend of Korra is an American animated television series that aired on the Nickelodeon television network from 2012 to 2014. It was created by Bryan Konietzko and Michael Dante DiMartino as a sequel to Avatar: The Last Airbender.
The Contenders
11 Kipo and the Age of Wonderbeasts
12 Sonic the Hedgehog (Sonic SatAM)
13 SpongeBob SquarePants SpongeBob SquarePants is an American animated television series created by marine biologist and animator the late Stephen Hillenburg for Nickelodeon. SpongeBob is currently the most popular show on Nickelodeon, as well as the longest running show, running for 23 years, and is beginning its 13th season. The show revolves around a sea sponge called SpongeBob SquarePants and his adventures under the sea. The show is considered to be one of the best Nickelodeon and cartoon shows of all time.
14 Rick and Morty Rick and Morty is an American adult animated science fiction sitcom created by Justin Roiland and Dan Harmon for Adult Swim.
15 She-Ra and the Princesses of Power
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