The Orthrus Line encompasses Orthrus Houndour and Cerberus Houndoom, which were released as part of the fifty first Mass-Click Weekend on the 4th of February 2019, and are Exclusive Pokémon. They are multi-headed versions of Houndour and Houndoom, with colours and design elements taken from Zweilous and Hydreigon.
Orthrus Houndour can be obtained by trading with other users or by breeding a female of the Houndour line with a male of the Deino line. The vanilla method of breeding with an Orthrus/Cerberus parent also works.
The Orthrus Line Exclusives were distributed as part of the fifty-first Mass-Click Weekend on Pokéfarm Q. Its egg was given as a reward to any individual user with at least 10,000 interactions during the event weekend.
- 2,344 users reached the interaction target of 10,000.
- Orthrus Houndour's egg's file name was "whatisthis-theressomethingwrongwithmcw-idontlikechange.png".
- The Orthrus Line was the first line of Exclusive Pokémon to be released as a Mass-Click Weekend reward.