>>41812702While some find it hard to see chesnaughts paladin inspirations, they are there as chesnaughts body is covered in a suite of armor, and it can form a shield via its arms in order to defend itself. The fighting type most likely comes from the fact knights fight for others, or fight to defend something like a castle. Knights are super loyal to whoever they pledge themselves to, and in the anime the chesnaught they meet refuses to leave a barren land until he carries out his trainers wishes.