Big Brain Academy:
Get a score higher than the indicated number of grams to get the corresponding medal:
In the Get In Shape mini-game, there is a picture formed by the shapes that resembles the Fire Flower from the Super Mario Bros. series. In the Missing Link mini-game on Hard mode in practice, you will eventually see a picture that when you finish, is a circle with the letter "M" in the middle. This is the same logo as found on Mario's hat.