This is one of my favourite games in Nintendo's game series, and really want to run 100%. Anyone have any tips for me?

Hi, sorry for the slow response, I don't check these boards very often.

One really nice thing about this game is that the routing is very flexible. So for any% you can do a wide variety of stars depending on which screen you might struggle with more than others. The best thing to do would be to just play around and get comfy with shots on important screens to get where you're trying to go.

In 100% you still have a lot of flexibility in routing because you have to go to each world twice at minimum to do the red coin stars. When I routed 100% the only really big thing was ordering the boss rematches at the end to be as efficient with item use as possible. When you beat one of the boss rematches you unlock a double item box that has a good use for one of the other bosses.

Another thing is if you lose your ball at any point, all of the item boxes reset, so you could lose your ball at any point to go back and grab an item box again if you mess up a screen.

Good luck with 100% if you decide to start running it, or just running this game in general! Feel free to message me if you have any other questions.