Film? Because as pointed out here, there's a surprisingly close resemblance between the two:
http://www.backofthecerealbox.com/2014/09/mario-anime-great-mission-to-rescue-princess-peach.html
Could Wario Land 4 have been refering an old Mario movie, in addition to the many other things it referenced?
http://www.backofthecerealbox.com/2014/09/mario-anime-great-mission-to-rescue-princess-peach.html
Could Wario Land 4 have been refering an old Mario movie, in addition to the many other things it referenced?