No. you will have to trade it, if you want a Gengar.
this is the same, with Graveler to Golem, or Kadabra to Alakazam.
You can not evolve a haunter playing a simulator that has not been created by yourself. You can create your own simulated game and put wild Gengar out in the field of pokemon.
The only way is to trade it. You'll need to trade for a Haunter or Gengar if you want to own one.
it has to level up
to my knowledge you cant. some one has to trade you a hounter. the hounter will immediately evolve into gengar. you can just trade it between two of your own games, ifyou have access to two DSes
You can't make your own pokemon.
level them up on your own and slowly
The only way to see/own poliwrath in fire red is to evolve poliwhirl using a water stone.http://www.youtube.com/watch?v=ZQZBpYao3vY
There is no "best" Pokemon because every Pokemon has its own weaknesses and strengths against other types of Pokemon,
The rainbow pass is a key item in Pokemon FireRed version. To trigger the events to get it, you first need to own 60 different Pokemon.
The same Pokemon as you, as you are Red in Fire Red. Your rival is Blue/Gary.
You have to use a Moon Stone to make it evolve into Delcatty, it won't evolve on it's own.
No. I own it and i have beaten it many times.