[QUOTE="elicik"]

I don't know them by name so like this

Easiest: 7-Final Castle

Hardest: 3-Final Castle 

Gonzafan

So, is the 3-Castle boss able to push off to the edge if the character hit one of his balls, which is why it is the reason why it is hard? 

I don't know them by name so like this

Easiest: 7-Final Castle

Hardest: 3-Final Castle 

but theres only 120 ?gerudoman320

[spoiler] After getting 120 stars as Mario, beat the final boss again. After the credits, a message will say that you've unlocked Luigi. After getting 120 stars as Luigi, beat the final boss again. After the credits, go to where the green lumas are. A new luma will get transport you to Grand Finale Galaxy, where the final star is. Because you can get 121 stars as both Mario and Luigi, saying that you got 242 stars means you have gotten every star. P.S. Luigi is awesome. [/spoiler]