>>31618273If you want to stretch you can kind of see a pattern going with the choices. Compare them to the primary stats these classes often have in games.
Chestnaught - Strength/Grass
Delphox - Intelligence/Fire
Greninja - Dexterity/Water
Decidueye - Dexterity/Grass
Incineroar - Strength/Fire
Primarina - Intelligence/Water
Going by this, the next class basis should be something like
Grass - Intelligence
Fire - Dexterity
Water- Strength