When you say "Those not listed on the normal routes may not be kept", does that mean that Pokémon from caves or the Safari Zone aren't available? Or is it just that anything not on the Pokémon availability lists is out?

Also, I'm assuming that as long as we aren't picking five waldos or something ridiculous like that, multiple Pokémon are okay to keep? /eying Druddigon and Seviper for Domri