XD Gayados? You probably mean Gyrados. Whip out your super rod and hope you get lucky. Gyrados is just a shiny when its red.
you need to migrayed bia pal park from your Pokemon leaf green or fire red
get it in Pokemon colloseum get the Pokemon game pack for ur gamecube and trade it in to fire red or emerald then into ur diamond or preal
Breeding.
Go through victory road.
you go get poke balls and catch Pokemon. that simple mmk
You must by a action replay
a preal is a fish
you can get mew and mewtwo by migrating it from Pokemon fire/green
there are actually 2 new moon and i forgot the other
You can't. You can only send them over from Ruby, Sapphire, or Emerald via Pal Park.
paul does not exist in Pokemon diamond or pearl its just who you name ur friend (rival)
you don't need a cheat code you just need a master ball to catch someone else's pokemon. glad to help! emilytheanswerwizard99