I need help uprading my mefals to the next stars. I i level up a brose to mac, but i don't know how to increase to next rank

Once your medal has max level, go to the Keyblade-menu and search the medal you'd like to upgrade. Press the medal so you can see its stats. If your level is max, press the rightmost red button. There you'll see what you need to upgrade your medal.

 

Level needs to be max. The Max Level depends on the stars.

1 Star = 20

2 Stars = 30

3 Stars = 40

4 Stars = 60

5 Stars = 80

6 Stars = 100

 

Below the medals you'll see 1-5 different medals. You need to have all of them. Cheshire Cat, Merlin, Fairy Godmother, Yen Sid and Fantasia Mickey can all be collected from Friday Missions (If I recall correctly) or different missions through the game. You will also need Flora for Power, Fauna for Speed and Merryweather for Magic.

You also must have enough munny.

 

Then press the button on the bottom left.