DOOM DOOM DEADOWS SPOOKY POKÉMON JEOPARDY

Ghost-ly Knowledge

100

The only two types of pokémon ghost type pokémon are immune to

Normal and fighting type pokémon 

200

Ghost type moves are most effective against these two pokémon types

Ghost and psychic type pokémon 

300

Generation that was the first to introduce a ghost type elite four specialist
_{(Bonus points if you can name this trainer by name)}

Generation IV (Black/White/Black2/White2)(Shauntal of Unova (+50))

400

Generation that was the first to introduce a ghost type specialist as a gym leader
_{(Bonus points if you can name this trainer by name/location)}

Pokemon Sword
(Allister(+50) of Stow-on-Side gym(+100))

500

This type of pokémon was originally immune to ghost type moves in generation I

Psychic type pokémon

National Dex

100

First ghost type pokémon recorded in the national dex

Gastly

200

Only region without a notable ghost type specialist

Kalos

300

Generation that introduced the most ghost type pokémon

Generation VII (Pokémon Sun/Moon/UltraSun/UltraMoon)

400

Generation that only introduced one new ghost type pokémon 

Generation II (Misdreavous)

500

The Galarian version of this pokemon will only evolve if it takes 49 HP or more in battle without fainting and then walk with it under a large stone arch in Dusty Bowl

Galarian Yamask

Locations

100

Known for its large graveyard and frequent ghost sightings.

Lavender Town

200

Abandoned building near Eterna City that’s said to be haunted 

Old Chateau

300

An old, disturbing childhood bedroom inside Team Plasma's castle filled with broken toys and an out-of-tune music box.

N's Bedroom

400

A dimension on the other side of the Pokémon world where time doesn't flow and space isn't stable.

Distortion World

500

Lone house at the base of Reversal Mountain being actively haunted by the ghost of a young girl, the same one who appeared on Marvelous Bridge in Pokémon Black and White. 

Strange House

Pokédex entries

100

"A [blank] is close by if you feel a sudden chill. It may be trying to lay a curse on you."
_{- Dex entry from Pokémon Yellow}

Gengar

200

"It wears a rag fashioned into a Pikachu costume in an effort to look less scary. Unfortunately, the costume only makes it creepier."
_{- Dex entry from Pokémon Sword}

Mimikyu

300

"It tugs on the hands of children to steal them away. However, it gets pulled around instead."
_{- Dex entry from Pokémon Pearl}

Drifloon

400

"A discarded bug shell that came to life. Peering into the crack on its back is said to steal one's spirit."
_{- Dex entry from Pokémon Diamond/Pearl/Platinum}

Shedinja

500

"It was banished for its violence. It silently gazed upon the old world from the Distortion World."
_{- Dex entry from Pokémon Platinum}

Giratina

Ghost-ly Knowledge 2 : Ghosts take Manhattan

100

Number of spirits that make up Spiritomb

108

200

Ghost type move first introduced in generation IV

Hex

300

This pokémon can only evolve when holding a reaper cloth during a trade

Dusclops

400

This regional variant with a ghost typing is only obtained when Primeaple uses their signature move "Rage Fist" 20 times in battle 

Annihilape

500

This many ghost type pokémon exist between generations I and II
_{(Bonus points if you can name the number of pokémon by name)}

4
(Gastly, Haunter, Gengar
 (Gen 1) and Misdreavus(Gen 2) (+50))