I got a SHINY Spiritomb through the GTS for a lvl.1 male Magby, and I'm pretty danm sure it's hacked.
Pokemon Species: Spiritomb
Ball: Ultra Ball
Area encountered: Pokémon League (the biggest hint to that it's hacked)
Level encountered: appearantly met at lv. 61
Moves: Dark Pulse, Psychic, Silver wind and Embargo
Here's a pic:
The "pokémon league" thing proves that it's a hack, right?