It's to the right of the castelia side exit of pinwheel forest. But you have to catch cobalion at the end of mistralton cave to release the seals to rumination field and the trial chamber in victory...
Its better if you watch a walkthrough on youtube
Hitomoshi can be captured in Celestial Tower. If you are playing an English language game you will be looking for 'Litwick"
take a left at the next round about.
In Pokemon Black and White, Pokemon 630 is Mandibuzz, full evolution of Vullaby.