Shiranui was at the ranch training the Pokémon he caught in Alola when he came across a Mudbray jack resting contentedly in a mud wallow.  He waited until Mudbray got out of the wallow and then the battle was on.  He sent Ashika out and Mudbray was struck with an Aqua Jet compliments of the Brionne.  Mudbray's Defense stat went up from the hit and Shiranui realised he was battling a physical wall.  Mudbray gave Ashika a Double Kick and Shiranui winced when Ashika felt the two impacts from Mudbray's hard muddy hooves.  He threw a Poké Ball at Mudbray and the jack was drawn in.  The Poké Ball shook three times before it issued a loud ping, indicating a successful capture.  He named his new friend Tsuchi and looked him up on his Pokédex.  "[i]Mudbray, the Donkey Pokémon.  It loves playing in the mud.  If it isn’t showered with mud on a daily basis, it gets stressed out and stops listening to its Trainer.[/i]"  He discovered why Tsuchi got a Defense boost from looking at the Pokédex and it was from an ability called Stamina.