EDIT: CRUD ! NINJA'D!
For SHinyUmbreon189, 189 is Jumpluff in the B/W pokedex. Jumpluff is blue. The only other blue pokemon in your sig/avatar is Kyogre. Kyogre is a legendary pokemon, and you are not legendary quite yet. A pokemon related to Kyogre is Wailord, as both are wail/water typse. HEnce, you are wailord.
For D4rk before I was ninja'd:
Your avatar is a Gardeivoir and Milotic.
What do these two have in common?
Psychic-typing...or at least part-psyching typing.
You have a Mew in your sig, also Psychic type.
Psychic type Pokemon + Mew/Gardevoir/Milotic
Gardevoir's name is the only one that doesn't start with M.
That singles it out.
Psychic Type pokemon= Gardevoir
Gardevoir + d4rk (dark)
Your username is dark.
What relates to Gardevoir, but is dark?
Gengar.
In PMD Red, Gengar and Gardevoir had a strong relationship.
Though Gengar isn't dark type, he kind of has a dark heart.
He is the antoganist of the games.
Hence, you are Gengar.
...