Her birth name is Sylvia Jane Kirby but currently goes by her married name, Sylvia Hutton.

I do not have access to personal information about individuals unless it has been shared with me in the course of our conversation.

There was no Shadow Kirby in Kirby 64. The Shadow Kirby appearances are:

Kirby and The Amazing Mirror: Shadow Kirby was an enemy.

Kirby Squeak Squad: Kirby could spray-paint himself to look like Shadow Kirby.

Crash kirby

Kirby, Meta Knight, Galactic Knight, Keeby*, Shadow Kirby, Red Kirby, Green Kirby, Blue Kirby,Marx** *Keeby=Yellow Kirby **Marx May be an altered Kirby.