Star Powered is a mod that adds:

• LUIGI and DAISY over MARIO and PEACH
• New music made by CousinCatnip and DarkKefka!!
• Various Items and Equipment
• New Armor and Accessories for Bowser, Luigi, Mallow, Daisy and Geno.
• More Spells for Luigi, Bowser, Mallow and Geno!
• New boss fights in areas that could have benefitted from one.
• NO MORE UNUSED ENEMIES
• New enemies too!
• One late game area is now entirely different!
• MASSIVE stat boosts once you hit level 27-30 (Albeit not as massive as of 2.5)