>>50517352Nah, it's native to the waters the Safari Zone built itself around. Gameboy Era lore even makes a point that the Dratini Line was formally discovered as a real species because of it.
>Legendary Pokémon live! A Safari Zone visitor just happened to catch a Dratini in the park’s pond. The lucky angler became an overnight sensation with news of the discovery exploding globally. This fortuitous accident convinced many that all legendary Pokémon exist without any doubt. It ignited a massive wave of Pokémon expeditions.If it were Johto native, they'd probably already have it catalogued due to the Safari Zone's imports and assistance from Blackthorn. But they didn't, so if anything this paints a picture that the secretive Blackthorn Dragon Tamer Clan were keeping Dragon Types like Dratini a secret from the world, which is why no one's ever made the globally-known discovery prior to this chance event.