what pokemon do i use the masterball on in pokemon diamond?

Question

ok, i know there are a crap load of legendaries in pokemon diamond which is why i don't know which one to use the masterball on(usually i have no problem telling ledgendaries from masterball-ledgendaries). if your about to tell me its Dialga, Uxie, Azelf, or Mesprit i know its not. but i have heard of a level 80 ledgendary named Acreus which you need to get to Spear-something to get but i dont wanna go there and waste a master ball so if anyone knows who the master ledgendary is- please tell me the name and where to find it and if i need to do any sidequests or something first to get it

Answer 1

the pokemon u should use your masterball on is not arceus beceause you have to go to a nintendo event witch wont be around for over a year, so get an action replay or use it on giratina. you need to beat the game and have the national dex then go to the route from 3rd to 4th gym towns and stay as far right as you can and you will go to turnback cave you need rock climb and defog. there will be no trainers but it is a puzzle

Answer 2

Well, Heatran and Giratina are in caves, so Dusk Balls have a whopping x4 catch rate. Dusk Balls were pretty much made for those 2 legendaries. Personally, Giratina was so easy to catch. I caught it on around my 4th Dusk Ball, no joke. And Heatran wasn't that bad, and I caught him with an Ultra Ball. Now Cresselia was so annoying. But if you know how to catch her, it's pretty simple. Make sure to change the time of your game to night time. Well, first, go to Turnback Cave where you see Giratina, and go DEEP inside to find some level 66 Golbats with Mean Look. Catch one. Then go track down Cresselia on your marking map on the Poketch, with Golbat in the front of your party. When you find it, use Golbat's Mean Look on Cresselia, so it can't run away. Hit Cresslia a few times, then start throwin Dusk Balls. I actually caught it with an Ultra Ball. Honestly, none of them are hard to catch if you have dusk balls and use my strategy for Cresselia. If I had known my startegy earlier, Cresselia wouldn't have given me a hard time at all. I would say it doesn't matter who you use it on, because they are all easily catchable. You could just save it and get an Action Replay so you can find Arceus, Darkrai, and Shaymin. If you don't get an Action Replay, I would just say use it on Cresselia and save yourself the trouble of catching a Golbat and having to keep tracking it down. Hope this helps.

Answer 3

Cresselia or Mesprit only if you don't wanna go around and look for them.
I would say save it for Darkrai.