Super Mario World 2 feature in Nintendo Power Vol. 77
Super Mario World 2: Yoshi's Island feature in Nintendo Power Magazine Vol. 77
An mega 17 page guide to Super Mario World 2: Yoshi's Island from Nintendo Power Magazine Vol. 77 giving information on Yoshi abilities and alternate forms such as the Yoshi Copter, background story and loads more.
I have also included the magazines cover, as it featured artwork from SMW2. This was published in October 1997.