The complete Pokemon Diamond and Pearl pokedex, part 9

Pokémon Name: Azelf
Type: Psychic
Classification: Will
Pokédex Number: 148 Sinnoh / 482 National
Ability: Levitate – Immune to Ground-type attacks
Useful Attacks: Last Resort
Location Found:
D/P/P: Valor Cavern (Lake Valor)
HG/SS: Trade with D/P/P
B/W: Poke Transfer

There isn't much to be said about Azelf that hasn't already been said about the other two. Living in the cave beneath Lake Valor, Azelf has guarded Sinnoh for eons, something you'll put an end to in a few short minutes. Arguably the most attractive of the lake guardians, Azelf also probably has the most useful stats of the three, focusing on Attack, Special Attack and Speed.