To catch Porygon in Pokemon Diamond you need the National Pokedex. After getting the National Pokedex go to Trophy Garden in Route 212 and talk to the owner. When he says he has seen a Porygon it will now appear in the Trophy Garden.
Yes, there is polygon that is called a diamond but it is not the same shape as the precious stone.
A rhumbus?
Not
A diamond is indeed a polygon. It's a closed figure lying on a plane and constructed of straight lines.
Quadrilateral.
naww!
In general, a diamond shape is neither a square nor a regular polygon. Only in an extreme form is it a square and therefore a regular polygon.
you cant catch it it is rare
No, But you can catch one in Firered and then Migrate it to Diamond
ucant catch misdreavus in diamond
no it's not
a rhombus