Add plural inflector for pokemon

config/initializers/inflections.rb

@@ -14,3 +14,6 @@
 # ActiveSupport::Inflector.inflections(:en) do |inflect|
 #   inflect.acronym 'RESTful'
 # end
+ActiveSupport::Inflector.inflections(:en) do |inflect|
+  inflect.uncountable 'pokemon', 'pokemon'
+end