Mega Man Legacy Collection’s 3D support isn’t too extensive
Most 3DS games support stereoscopic 3D, but there are some that don’t. In the case of Mega Man Legacy Collection, there is some 3D functionality… just not much.
Dennis is currently playing through Mega Man Legacy Collection for review. He tells me that the menus are in 3D, but the games themselves aren’t. You can turn the slider on and see that the background becomes 3D, but it doesn’t do much since it’s just a basic black background, and for whatever reason there’s a flicker on the sides when you turn it on. It’s not like the 3D Classics or SEGA ports on the eShop.
As for Challenge Mode, these bite-sized gameplay segments are just like the main games where the background will have depth but the game is still flat. Museum Mode has depth while you’re scrolling through, but once you select what you want to look at it, the picture becomes flat again.