Shiranui did some research on the Motostoke Gym while walking to the Motostoke Pokémon Centre.  "Here's what I found about Gym Leader Kabu;" he stated, "His roster appears to be inspired by the Fiery Riddler back at Kanto while his headliner is what truly makes him an apparently impenetrable wall according to both anecdotes on social media and Kabu himself.  Type matching alone won't defeat this guy."