First, you need togapre, then have it love you ang it will evolve into togeget, use a dawn or shiny stone (i can't rember wich) on it!
it comes in a swarm
you can use an action replay.
you cant get a diamond on Pokemon pearl but you can get a pearl on diammond ...and pearl.
After Togekiss Pokemon number 262 is Porygon-Z.
You can't. Togekiss is a final evolution
No
you have to get the secret potion from Cynthia
Buneary, Mamoswine, Pachirisu, cyndaquil, togekiss ( I have no clue when she will get Togekiss), and Piplup.
No
No. NeonGreen16
Togekiss is a Generation 4 Pokemon, so it's impossible. (That and the Shiny Stone doesn't exist before that Generation.)
Cynthia