I didn't see a post for New Super Mario Bros U, so here we go. Although the game doesn't have online multi-player, I believe adding others as friends will cause their Miiverse messages to show up. Which could be great for sharing tips. My Nintendo ID is in my sig.
Speaking of which, I'll kick things off with a question. What the heck do you do with the baby Yoshi that you find throughout the game? I know they show up around the map and follow you, but they just seem to walk around helplessly and change direction only when I jump on them. How do I get them through a course, and what are they looking for when they say they need food?