Giratina is also a Pokemon Diamond legendary. When you encounter it, it will be level 47. In Pokemon Platinum, all legendaries include ten key Pokemons (these are the ones you'll find the easiest, although there are more than ten in the game). These Pokemon are 'a group of incredibly rare and often very powerful Pokemon,' so catching them tends to be challenging. To catch every Pokemon in the game, you'll need to capture the legendaries in Pokemon Platinum. IGN, for example, gave it an impressive 8.8 out of 10, citing that 'for those who haven't jumped into the Pokemon adventure yet, Platinum is the one to back'. Nintendo's effort paid off, given how highly rated the game was and still is. It is an enhanced version of Pokemon Diamond and Pearl, aiming to fix some of the issues and create a more comprehensive game. Pokemon Platinum was a stellar game for the Nintendo DS console. What Legendaries Are in Pokemon Platinum?

Part 1: What Legendaries Are in Pokemon Platinum?.