Grand, Power, And Silver Stars Lore
So as I established in a previous post, the Stars from Mario Party are Super Stars. Super Stars are not the same thing as Power Stars.
This is because Power Stars can provide energy and give the user the ability to wield Star Magic. While Super Stars grant invincibility or Super Strength.
So as seen in Super Mario 64 DS and Super Mario Galaxy 1 & 2, collecting 5 Silver Stars will result in all 5 stars combining to make a Power Star.
This is because the Power Star was likely broken up into pieces, something we see can be done with other stars such as the Cobalt Star.
Power Stars themselves are created when a Luma transforms into one at a certain point. Lumas overall seem to become everything, from Star Spirits to Power-Ups. Showing just how much power and influence the Stars have in the Mario world.
This also make sense because Power-Ups overall, in particularly Super Stars show signs they are sentient.
Also, as established at the beginning of Super Mario Galaxy, Grand Stars are the result of combining several Power Stars together.
"The Toads brought the shooting stars to the castle, where they became the great Power Star.".....
Also, something else that is important is we know for a fact Power Stars and Power Moons are the same thing just in different shapes.
Shine Sprites and Cat Shines are also likely the same thing in a different shape as well.
I have also hypothesized that Super Stars similarly to Power Stars, can also come in different shapes as well.
So yeah, that is Silver, Power, and Grand Stars in a nutshell.
Written by Eris the Lorekeeper