Yoshi Star Galaxy

Yoshi Star Galaxy is one of the many galaxies in the game Super Mario Galaxy 2. Not much is known about this galaxy at the moment, except that it is the first galaxy in which Yoshi is found, however, before Mario can break Yoshi's Egg, he must defeat a Magikoopa to break the seal surrounding the egg. The galaxy itself consists of lush meadows, with many flowers, grassy paths and an active volcano.

Main Planet
Mario lands on the main planet near a Dry Bones head statue. The pathway ahead of the start goes uphill, dominated with Piranha Plants, Electrogoombas and Spiky Plants. Ahead after the pathway, there is a force field around a Yoshi Egg on a nest guarded by a Magikoopa. After it is defeated. the force field disappears and the Yoshi Egg can be cracked open to release Yoshi. Just up ahead of the egg's nest are some Berries and enemies that Yoshi can eat for Star Bits. There is also a huge volcano, where Mario and Yoshi finds the Launch Star revealed after a pumpkin is eaten by Yoshi.

Bonus Planet
There is a warp pad near the volcano at the main planet which Mario can take to warp to the bonus planet. There are seven Electrogoombas there, which Yoshi must eat quickly before time runs out to reveal three 1-Up Mushrooms. After time runs out, Mario and Yoshi are warped back to the main planet.

Earth Planet
After using the Launch Star from the first planet, Mario and Yoshi land on a tiny planet, where they can pass by a Midway Point. It has Item Crystals, insects, and a block that releases a prize. One of the crystals reveals a Launch Star, which Mario must take to travel to the next planet.

Tall Planet
In this planet, Mario and Yoshi must climb up the tall planet to reach the Launch Star. There are Piranha Plants and Spiky Plants up there, which Yoshi can eat (they take a while for Yoshi to try to swallow them). At the top, there are Electrogoombas and a flower grapple. Using his tongue, Yoshi can swing up to a tiny wooden orb with the Launch Star.

Saddle Up with Yoshi
To get the Power Star, Mario needs to free the Yoshi Egg protected by a barrier that a Magikoopa made.To do so, he has to defeat him.Then, use the Spin Attack on the Yoshi Egg to crack it.If done so, Yoshi will come out so he can team up with Mario for the first time.

To process, Mario has to make Yoshi eat the big red Berry.When done so, a Launch Star will appear to blast-off Mario and Yoshi to a little planet.Here, Mario has to break one of the Green Crystals to make the Launch Star accessible.After using it, he'll get to a mountain-like planet.Mario, with Yoshi's help has to make his way to the top.

Here, the player will notice a daisy inside a bubble, he has to use Yoshi's tongue to reach it and vault over to the small planet with the Launch Star.After using it, he'll get to the planet with the Power Star.He has to make it to a high platform with a crystal by using Yoshi's tongue to pull platforms and grab daisies.When reaching the platform, the plumber has to break the crystal and get the Power Star.