Ghost
yes, yamask evolves at level 34 into Cofagrigus
there are four pokemon that could help you and they are. sandile timburr gurdurr and if you have someone to trade with cronkeldurr
Haunter can only learn Scary Face in Pokemon Black and White. Even then, it is by breeding it with a Cofagrigus, and it will be a Gastly that you have to evolve when you get the egg.Scary FaceBlack/White: Egg Move (as Gastly)Inheritance Chains for Egg MovesHaunter < Cofagrigus Cofagrigus - Scary Face Black/White: Level 34
Cofagrigus and Yamask are not obtainable in Pokémon X and Y, and thus you either have to transfer them from any Generation V game (Pokémon Black, White, Black 2 and White 2) through the Poké Transporter and Pokémon Bank 3DS apps, ask someone to trade them with you or look for them at the GTS.
its an opinion really but for me i get 2 dark types(bisharp, Hydriegon)2 psychic types(Gardeivoir, Gallade)2 ghost types(Cofagrigus, Mismagius) I hope this helps it works really well for me.
no you cant
Anything fire or flying type.
No. But toward the end, Zekrom comes and you catch it. You battle it against Reshiram, but the opposite in pokemon black.
get haxorus at least level 50 to battle his cofagrigus. dragon dance 2 times and that should be enough. kill his cofagrigus with dragon claw. make sure haxorus knows brick break. kill his bisharp and bouffalant with brick break.
using super effective Pokemon against his' Pokemon you'll need a super effective Pokemon against his starter but you don't need to win with super effective Pokemon just stock up on potions that's what I do.
yes you can as long as its not anything against the law
Well, first defeat N from the Pokemon League, then Ghetsis heals your Pokemon and you fight him. You'll need Dragon type Pokemon or Ice type Pokemon with high level to defeat his Pokemon, because there is a really powerful Dragon type Pokemon named Hydreigon. You'll need Grass type Pokemon also to defeat his Seismitoad. Fighting type to defeat his Bisharp and Boufflant, Dark type to defeat his Cofagrigus. Hope this helps and good luck!