no.
Serperior cannot learn any ghost type moves.
sentret and furret.
Sentret is a Normal type pokemon.
It is a ghost type move.
A ghost type move.
There is no Ghost Pokémon that can learn Helping Hand.
I don't know about Pokemon black and white, but in Generation IV the strongest ghost move is Shadow Force, but only Giratina can learn it. A decent ghost move is Shadow Ball if you can't get an Action Replay DS.
Sentret is #161 in the national pokedex, and it is a Normal type Pokemon.
yes his name is saleaf
In Pokémon Emerald, Salamence learns the move Crunch at level 50. This Dark-type move can be useful for dealing with Psychic and Ghost-type Pokémon. To have Salamence learn it, simply reach this level during battles or training.
Yes, Croconaw can learn the move Crunch. It typically learns this Dark-type move through leveling up or using TMs in various Pokémon games. Crunch provides Croconaw with additional offensive capabilities against Psychic and Ghost-type opponents.
Yes, there are many Normal-type Pokemon that can learn Shadow Ball, among other Ghost-type moves, by TM. This is useful for beating Ghost-type Pokemon, since Normal-type Pokemon are immune to Ghost-type attacks.