Toy Time Galaxy

Heavy Metal Mecha-Bowser

Ride the train around the circle here, then launch yourself across to the next planet. The gear creatures here are distressed about their friends who've been kidnapped—aww. You can kill the turtles by groundpounding them.

Make your way around this area, unspinning bolts and screws wherever you can. If you climb up on the wall near the laser creature (you can drop down to the coins on the walkway to find a shield), you'll be able to unscrew a golden screw that will drop a grate. There's a blue switch across the way from the bottom of it that will extend a walkway allowing you to reach the launch star.

You'll find a Spring Mario outfit on the next planet; you'll need it to move upwards here. Keep in mind that you can still groundpound in spring form. When you reach the upper level, you'll find another Spring Mario suit. Moving to your left will find you a pipe with a puzzling puzzle inside: if you can launch yourself to the top and hit the golden coin there, any bricks you didn't smash will turn into star bits. It can be tough reaching the coin, though.

If you make the coin or skip it, return to the moving walkways and bounce past the laser guard there. It can be tough to get past him, but if you're having trouble, try not jumping; just bounce. You can move a bit more quickly like that. If you can get past him and launch yourself up the nearby blocks, you'll find another launch star.

This stack of blocks is what you need to hit to finish off the Mecha-Bowser.

That star will lead you to the robot planet. Begin by unscrewing the two screws on its legs, then riding the launch star up to the waist area. Make your way through here, past the arm, and quickly take the launch star from the arm joint up to the head. Grab the Spring Mario suit here, jump over the Magikoopa and over the flames coming at you, then head up to the top of the head and smash the stack of bricks there to finish off Mecha-Bowser once and for all.

Mario Meets Mario

When you reach the first large planetoid here, hop around to find the five pieces of star shards. Four of them are pretty easy to find, but the fifth will require you to unscrew the blue screw here. That'll unveil a launch star.

Ride the launch star to the next portion of the area. This part can be kind of tricky: there are five star pieces around on this plane, but the only things you can step on are platforms that will either rotate or disappear. The thing to keep in mind is that you need to keep a path open so that you can actually return back to the platform where you start the plane on. When you find all five of the star pieces, return there and nab the Power Star.

Bouncing Down Cake Lane

Take the launch star, then spring up and walljump upwards when you land. Make your way over the chocolate walls, down onto the spinning orange circle, and around to the launch star. Keep moving until you come to the small slivers of ice that have enemies on them; the safe way to proceed here is to zap them with star bits before jumping.

Mean moles manhandling machineguns must…be destroyed.

After using the cannon to hit the next launch star, you'll land on a cake. You can find a 1-Up by heading into the pipe at the end of the red spoon here. Get to the top of the cake and blow out the candles by spinning into their flames to move on.

When you reach the Mole that spits electricity at you, grab a Spring Mario suit, get near the bottom of the bottle of gumballs, then launch yourself atop him and ground pound him. Do this three times to unlock the Power Star.

Bonefin Galaxy

Kingfin's Fearsome Waters

Note that the Bonefin Galaxy will take its sweet time on getting accessible; we had to wait until we had 80 power stars before it came online.

When you can reach it, you'll find yourself in for one heck of a boss fight. Kingfin is fast and fiercesome, and summons numerous Bullet Bill-esque fish to help guard himself. You'll need to grab the red shells underwater here and use them to hit Kingfin in his head. Repeat the process five times or so (don't forget to nab the Life Mushroom if you spot it) and you'll earn your Power Star.

Bowser Jr.'s Lava Reactor

King Kaliente's Spicy Return

You need to reach the Bullet Bill launcher here and guide the Bill around the planetoid back to the cage where the launch star is located. You can try a long jump to make a shortcut, but usually that will cause the Bill to impact on the ground.

Dat's a spicy ball of fire.

In the next area, get to the safe ground and jump forward to cause the two sentries to appear. Spin their coconuts back at them to kill them and reveal the launch star.

Kaliente offers you the same basic fight as he did before; all you need to do is reflect his coconuts back at him to defeat him. You'll have a lot more to contend with than you did before, such as the melting platforms. Keep in mind that you can somersault and spin up into the air if you're on a platform that's sinking; that'll give it enough time to come back up almost all the way.

Kill Kaliente for the Grand Star and move on.