I have many online goodies to share with you! First off if you plan on carving a Pumpkin and you want to showcase your favorite Halloweenish Pokemon or Pikachu see these stencils on Pokemon's website:
Next are some Halloween goodies available for purchase at The online Pokemon Center: http://www.pokemoncenter.com/Halloween-2015-Collections/b/12591960011?utm_source=p&utm_medium=referral&utm_term=microsite&utm_content=Halloween&searchSize=60
Also, on Pokemon's website is a fun Gengar themed mini-game called "Escape from Gengar's Mansion!" Found here: http://www.pokemon.com/us/pokemon-online-games/escape-from-gengars-mansion/
There are only four easy steps to this game:
Step 1:
Don't Listen to Gengar!
Whatever direction Gengar gives you, be sure to go in the opposite direction.
Step 2:
Pumpkaboo Prank!
Unlike Gengar, when Pumpkaboo gives you an order, be sure to follow it!
Step 3:
Four Scary Stages!
Challenge yourself to harder and harder stages featuring Gastly, Haunter, and Gengar.
Step 4:
Ghost-type Goodies!
Do well in the final two stages to earn wallpapers for your computer!
And last but not least! If you wish for something not-Pokemon endorsed, maybe something scarier? Over on the Underbelly YouTube Channel, they just put up a pretty funny faux trailer which mixes the Pokemon craze with 80's slasher movies. The result is some bloody good fun. Sit back, relax, enjoy, and … Catch ‘Em All! Kill ‘Em All!