LocationArea.location = relation(Location, backref='areas')
Move.type = relation(Type, backref='moves')
+Move.effect = relation(MoveEffect, backref='moves')
Pokemon.abilities = relation(Ability, secondary=PokemonAbility.__table__,
order_by=PokemonAbility.slot,
Version.generation = relation(Generation, secondary=VersionGroup.__table__,
backref='versions')
Version.version_group = relation(VersionGroup, backref='versions')
+
+VersionGroup.generation = relation(Generation, backref='version_groups')