Try using Rock or Ground types (Geodude, Onix, Dugtrio etc..) or Pokemon that know strong ground moves like earthquake or dig. His Koffings are pretty easy to beat, his Muk can be a challenge due to Minimize. Weezing is the most challenging because it has a higher level but an Earthquake or two can kill it. Just watch out for any Selfdestruct attacks from the two Koffings and you should be fine
Beating leafgreen tends to mean you have defeated the elite four and the champion and you have been inducted in the hall of fame. However the definition of beating leafgreen tends to go further into the game, this is my definiton: You have been inducted in the hall of fame and you have finished everything the game has to offer including the pokedex.
Simply defeat another trainer.
You can find Ghost-Type pokemons in Pokemon Tower in Lanvender City
Red is the boy playable character in leafgreen you don't defeat him because you are him.
Defeat Sabrina in Saffron Gym. Her speciality is Psychic Pokémon, so Ghost/Ground types are useful. Refrain from using Fighting or Poison type Pokémon or moves against her.
If you chose Squirtle as your starter Pokemon. Defeat the Elite Four and it'll roam freely in Kanto.
Ghost types are weak against other ghost types and dark types so use those types to defeat that elite four member.
you do not
Any ghost type Pokemon can learn it.
After you defeat the Elite Four.
defeat it
defeat it in battle
Simply defeat another trainer.
get some good pokemon with good move
Use Dark type pokemon.
This depends. What Pokemon are you trying to defeat? Try to get all legendary Pokemon.
You can't first you have to get a sliph scope
Ghost type attacks are super effective against both psychic and ghost type pokemon.