Pokemon Species: Mudbray (which is slated to evolve into Mudsdale either during the stay in Alola due to in-game battles/events, or sometime later in its stay with the Carnival!)
Catch Style: He'll be encountering it with Carly and making the mistake of 'befriending' its stubborn ass by accidentally saving it from injury or another Pokemon attacking it, or feeding it something because it just looks so pathetically derpy. And thus the bond between man and Pokemon was made.