How do you catch azelf in Pokemon dimond?

Answer 1

after you defeat team galactic for good at spear pillar go to lake valor and surf to the cave in the middle. talk to azelf and you will battle. it is best to use a dark type poke mon because they are immune to azelfs psychic attacks. use false swipe if you have it or use bug ghost dark attacks to take most of its health then use fighting psychic moves which aren't effective to get it to red in its hp bar. give it a status condition and use ultra balls. you can also use your master ball but you may want to save it for the elusive mesprit.