This section is incomplete. Please feel free to edit this section to add missing information and complete it. Reason: Information on his bond story.
This section is incomplete. Please feel free to edit this section to add missing information and complete it. Reason: Section for information regarding their appearance and interactions as a Special Coach at the Blueberry AcademyLeague Club Room
Hassel is a descendant of a long line of Dragon-type Trainers in an unnamed faraway region. He ran away from home as a youth to pursue a dream of "making music", before becoming a member of the Elite Four in the Paldea Region as well as an art instructor at the academy. Hassel is shown to be friendly, but very emotional, as he bursts into tears of joy when defeated by the player. He is an old friend of Gym Leader Brassius of Artazon. At one point, one of Hassel's relatives tries to convince him to come home, but his students' support prompts him to remain at the academy.
Upon defeating Hassel the third time in the League Club Room, he will trade a Arctibax to the player in exchange for almost any Pokémon excluding Shiny, Legendary, or Mythical Pokémon.
Hassel briefly appeared in Breathe Out. He was seen clapping alongside other teachers at Ohara's performance.
Trivia
The back vent on Hassel's coat could be in reference to the capes worn by Dragon Tamers, who Hassel has a history with, being a Dragon-type Trainer himself.
It might also be a nod to Clair and her design in Generation II due to how her cape resembles part of a suit.
Prior to the release of The Indigo Disk, Hassel was the only Paldean Elite Four member that could be rebattled indefinitely.
Hassel is left-handed, as shown when he throws his Poké Balls and in his official concept art painting a portrait of an Applin.
