Can you complete the Sinnoh Dex in Platinum?

Question

So since this was my first game (and favourite), I want to complete the Sinnoh dex. I know that some pokes aren't available (murkrow etc). I can just trade these from copies of diamond and pearl. The only Pokemon I don't know how to get is Manaphy. I think there was an event years ago for it, but I missed out. Although I have heard you can trade it from some Pokemon Ranger game. Is this true?

Answer 1

Yes, you can complete the Sinnoh Dex in Platinum.

As for your other question, Manaphy IS tricky if you don't know where to look. In Mr. Backlots mansion, in the room with Mr backlot, there is a table, with a journal on it. If you interact with that journal, you will get the "seen" entry for Manaphy.

And if you wanted to get the "caught" entry for Manaphy, then you would use the Pokemon Ranger method of transferring it over. However, it was only available through ranger net on all 3 games, and since nintendo terminated all online stuff for the wii and ds, it's no longer obtainable.

Source: Experience