How many Pokémon can be caught with a single copy of Platinum?

Question

Out of the 210 Pokémon in the native Platinum dex, how many are obtainable with only a single copy of Pokémon Platinum? This means no trading with Diamond/Pearl or from the Gen 3 games and no dual slotting.

Preferred if this was answered for the 493 national dex too.

Edit: Events that are no longer distributed also do not count, e.g. Arceus.

Comments

371, according to https://www.smogon.com/forums/threads/how-many-pokemon-are-obtainable-in-each-title.3690638/. Though I haven't gone through them all to make sure that's accurate :P

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I think the only ones that are unobtainable are version exclusives, trade evolutions (besides Steelix, which can be caught), 2 of the starters, 1 of the fossils, Spiritomb, and Manaphy. This might also help:
https://bulbapedia.bulbagarden.net/wiki/List_of_Pok%C3%A9mon_by_availability