youcould download the ROM and emulaters from here CoolROM.com - or if you think that is illegil you might be able to play it from here PlayR.com
http://www.Pokemon.com - There is no one specific website for Pokemon FireRed and Pokemon LeafGreen, but the official site will have all of the info you need to know on the two games. You can also search Google (Bing, Yahoo!, etc.) for specific results on other websites' pages just for Pokemon FireRed and Pokemon LeafGreen.
In Pokemon firered you can't, but in Pokemon leafgreen you can get it then trade it to Pokemon firered.
There is no Pokemon convention in firered.
To get Pokemon firered on PC download a vba and Pokemon firered ROM
Yes there are shiny Pokemon in firered
You cannot get it in Pokemon FireRed. It doesn't matter because it is not necessary in Pokemon FireRed.
It is not possible to get a ninth badge in Pokemon FireRed. You can only get eight badges in Pokemon FireRed.
u can download fire from CROM website u should download it with visual boy advance
Celebi cannot be found in Pokemon FireRed. The only way to get Celebi in Pokemon FireRed is receiving it from an event distribution. These events are sadly no longer supported for Pokemon FireRed.
Yes it has a slot in the bottem in the ds.
Depends on what you've played before. if you played Generation I(Red, Blue, Yellow) go with black. if not, fire red
you have to get sneasol by trading in leaf green. You can not get that Pokemon in firered.