Suggestions by @visno

Elon Musk

as Edgelords in Mount Rushmores

Gipsy Danger

as Giant Robots in Mount Rushmores

Sentinels

as Giant Robots in Mount Rushmores

Balto (Character)

as Dogs in Mount Rushmores

Perdita (101 Dalmatians)

as Dogs in Mount Rushmores

Pongo (101 Dalmatians)

as Dogs in Mount Rushmores

Tramp (Lady and the Tramp)

as Dogs in Mount Rushmores

Lady (Lady and the Tramp)

as Dogs in Mount Rushmores

Bolt

as Dogs in Mount Rushmores

Sparkster (Rocket Knight Adventures)

as Marsupials in Mount Rushmores

Buster Moon

as Marsupials in Mount Rushmores

Blinky Bill

as Marsupials in Mount Rushmores

Rocko Rama

as Marsupials in Mount Rushmores

Kangaroo "Jackie Legs" Jack

as Marsupials in Mount Rushmores

Tazmanian Devil

as Marsupials in Mount Rushmores

Kanga (Winnie the Pooh)

as Marsupials in Mount Rushmores

KaBlam!

as Nicktoons in Mount Rushmores

Action League Now!

as Nicktoons in Mount Rushmores

ChalkZone

as Nicktoons in Mount Rushmores

The Angry Beavers

as Nicktoons in Mount Rushmores