No. Mesprit, Uxie and Azelf can be caught normally, they're just extremely hard (especially Mesprit).
You really don't need a special pokeball but if you have a AR you can get unlimited master balls and that is what i used
where are special key in Pokemon diamond where are special key in Pokemon diamond
If the Pokemon is in the premier ball, you have a bit of a higher chance of getting it then pokeball, but great ball is better, so not recommended for higher level trainers.
None
Once a Pokemon is inside a Pokeball, no matter what type of ball it is, the ball is permanently used. Say you migrate a Pokemon from Emerald into Diamond, the Master Ball will disappear and will be replaced with the special Pokeball used in the Pal Park. The only way I can think of you getting that Master Ball is using a Gameshark or Action Replay code, but that code has yet to be made.
The Special Key is a key item in Pokemon Diamond. You can find this item in a warehouse in Veilstone City.
I think your talking about Arceus, a special event Pokemon.
the only way to get it is to trade it from Pokemon diamond or pearl you can get it on diamond and pearl by special events
trade with Pokemon Platinum
The pal park will give you special type of balls.
No where get an electabuzz and evolve it using some special item
yes