What is the purpose of Azelf Uxie Mesprit?

Answer 1

they are one of the Pokemon arceus made, to make the world.

here's the story... (by the way, it will make you laugh... just writing it! but it gets a bit sad at the end.)

once upon a time, arceus exploded into five bits, and he called them dialga, palkia, azelf, uxie and mesprit. so they were his assistants, but arceus was dead already. but then, suddenly, arceus came back alive just because he needed the loo. then arceus surprisingly pooped out a sixth assistant! he called it giratina, because it practically means "gigantic pooper". giratina wasted his life pooping new kinds of Pokemon into the world and reviving them, he also made Pokemon centers, and he is the little machine nurse joy uses to heal your Pokemon. 3 years later, arceus promoted giratina to his origin form because he did such a good job at making and healing Pokemon with his special pooper machine. anyway, azelf, uxie and mesprit got so jealous of this promotion arceus gave to a "pooper Pokemon", that they started bullying giratina, saying stuff like: "pooper!" . then arceus got really angry and annoyed with the three bullies that he called palkia and dialga to sing the "most dreaded song of all time... and space" to make them die for one year, so that they could think about what they had done to giratina... even though they themselves were dead. meanwhile, giratina was pulling his legs off and breaking his pooper machines because he was upset. he didn't want to be a pooper anymore. that is probably the answer for why some people notice that giratina hasn't got an even number of legs on each side of his body. but hen, giratina decided that he was being a crybaby. so he set off to arceus's palace while the other five assistants were there as well. then they got into a great big fight because they all wanted to be poopers, apart from arceus, who just let out a big roar of time... and space because palkia was sad, and went to sleep. and when he slept he suddenly had a nightmare because darkrai swapped his brain for snorlax's and he used sleep and nightmare, as he got darkrai's moves and abilities, but i don't really think darkrai eats other Pokemon, as you're about to find out. so anyway, snorlax was in such a confusion, he thought that arceus and his six assistants and all the other Pokemon apart from darkrai were apples. so snorlax ate all the "apples", apart from cherubies, who snorlax knew were edible, (but he badly hates cherries). darkrai sighed and pooped himself to death. then snorlax ate himself because he was still hungry, and darkrai fell up a tree and rotted there, as he was dead. the whole world was now the dark world because only darkrai's spirit lives there. now you won't like being in this world because this used to be the exact place where this event happened. and by the way, in the beginning, snorlax farted, and, even though this story came true about a gazillion years ago, it still smells. anyway, it is said that darkrai kills everything he meets, but he kills himself before he moves at any time, even though he can't die any more because he is a spirit and god lost count and just let him live. have a happy scary life, ( and happy hannukah)!