It used to be 20 for a shaman, but it got patched so that most speed increasing effects can be learnt at an earlier level, such as a hunter's aspect of the cheetah and a druids travel form.
The level requirement is level 16 :)
By batteling them against ghost type Pokemon
There is no Ghost Pokémon that can learn Helping Hand.
Yes a few years ago I was bitten by an invisible wolf ghost based on the 1935 wolf
The wolf is a second level consumer. This means that the wolf feeds on the primary producers, and is prey for the first level consumer.
Adventures of Superman - 1952 Ghost Wolf 1-23 was released on: USA: 20 February 1953
Jon Snow does reunite with his dire wolf "Ghost" at castle black.
Serperior cannot learn any ghost type moves.
Cole learned that the wolf is strong when its in a pack
the Bible would be the best place to learn.
no.
Ghost Hunters International - 2008 Search for the She-Wolf England 3-4 was released on: USA: 3 August 2011
I think you learn it from the white wolf.