Kenny.
The oldest kid is the youngest kids' neighbor.
The children's name's are the one in the wheelchair is called Timmy and the one with crutches is called Jimmy
Buttlord(the New Kid)
In my personal opinon, the coolest kid in South Park is Kyle, because he is the one that always makes the most sense and gives us viewers nice life lessons.
Starvin' Marvin.
His name is Chris.
Gregory
"I got something in my front pocket for you"
because he is a robot and most robots need codes to work
Do you mean the orange hoodie? His name is Kenny McCormick.
Ike, Kyle's younger brother is Canadian and thus posessed of a two part head according to South Park law.