I'm unsure whether the classic Leaf and Blue are from Pokespe or not.

Their eyes are green and blue, while the Red has black eyes and the game design. Plus they appear taller then, or as tall, as the remake designs.. But then again, young!Red is short in canon.

Well, "classic Leaf" has Jigglypuff, which was (is?) Blue's signature 'mon.

A lot of people put Leaf with Jigglypuff though.