Is Pine Walker legal in Standard, Modern, and Commander?

Pine Walker is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Pine Walker?

Pine Walker is a Creature — Elemental. Its oracle text reads: "Morph {4}{G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) Whenever this creature or another creature you control is turned face up, untap that creature. Power/Toughness: 5/5"