In addition to all the ones after mine (I'm
>>25212178:
>GrotleAce Trainer at Route 210
>TorterraAce Trainer at Victory Road
Gardenia rematch (Platinum only)
>ChimcharA Youngster at Route 207
>MonfernoAce Trainer at Route 215
>InfernapeFlint
>Piplup>>25212263, >>25212367 are right>PrinplupSame Picnicker as the Piplup one (rematch)
>EmpoleonSee Piplup and Prinplup
I think that's it. Although I do remember one NPC in Kanto Victory Road having a Charizard too, it might even be the same Cooltrainer with the middle evos, but I may be mistaken.