Once they were out of that nightmarish level, Luigi went behind a mushroom to barf for a bit before feeling better.
Wario: That was a weird dream, if I've ever seen one.
Mario: On the bright side, the stars we got in there were real. So it wasn't a complete waste of time.
Yoshi: Now let's hurry and find the last course so we can finish this!
Waluigi spotted another rainbow colored teleporter. It was on a circular wooden plank with golden star decorations.
Waluigi: Welp! I found it.
Mario: Judging by the star decorations, this one probably won't be so bad. Let's a go!
All stepped into the teleporter and disappeared.
Rainbow Road
You probably recognize this name from a certain kart racing series. Well, it's here now. For this course, it takes place in a beautiful night sky filled with stars colored in the seven colors of the rainbow making a trail in the skies. There was a dome in the middle of the course, where most of its rainbow-colored platforms are located; some of them created towers with Grand Stars at their top. Of course, since this level is named after an iconic race track, there was a small rainbow track circling around the towers.
The group showed up on top of a giant Disco Ball surrounded by platforms of a pixelated Mario, Luigi, Yoshi and Wario (in the original it's a Power Star, but I changed it in order to complete the DS quartet). The group couldn't help but smile a bit at this magical place.
Mario: Ah, Rainbow Road. Good times. Good times.
Mario shed a small tear from the beauty of this place.
Luigi: Remember our mission bro. There's no time to lose!
Mario: Right, right. Here we go!
Star #1: Flying Through the Rainbows
They first long jump towards the tower from behind them and follow a platform trail leading them outside of the dome, where there were two Rainbow Thwomps on the path.
Turns out that the platform worked like a conveyor belt, which pushed the heroes backwards. So they had to keep moving while avoiding the Rainbow Thwomps and then reach a floating flat yellow star with a star shaped hole in the center (a Sling Star), though none of the group were familiar with it.
Wario: What the heck is this?
Mario: I… don't know…
Mario touched it, and he was launched up to the next segment, which was a spinning rainbow tunnel with many holes in it. The other heroes followed.
Mario: I… was NOT expecting that!
Luigi: I know, right? Something out of this world!
As they crossed the rainbow tunnel, the Sling Star transformed into a small star shaped creature with black eyes, fingerless stubs as arms and legs, and a pointed top (a Luma). The heroes didn't see this transformation, as they were busy.
Luma: I guess they don't know yet. Oh well. I'm sure they'll know everything when Mama gets to meet them.
The heroes took the next Sling Star, it took them to a series of platforms with rainbow fences. To get to each platform, the group had to use music blocks to launch themselves upwards.
Mario: Wasn't expecting music blocks here.
After getting across the last few rainbow platforms, the last Sling Star took them right to the first Power Star.
Mario: Wahoo!
Star #2: Rainbow Perils
Starting back at the disco ball, this time the heroes long jumped toward the front and ascended up a rainbow tunnel. This took them to a narrow rainbow path inhabited by Thunder Lakitus, purple lakitus that shot lightning from their clouds. Toad got struck by one of them, but later defeated them with a mid air ground pound.
Toad: Hmph! Take that!
Next, they climbed up a Rainbow Thwomp to reach a section with rolling Chomps. There were 6 rainbow caps waiting for them.
Luigi: Oooh! These caps are rainbow! I wonder what they do.
Mario had a good feeling about what they'll do.
Mario: Let's a go!
Mario and Co. put on the caps, and they all immediately turned rainbow.
All: OH YEAH!
All of them charged through the chomps and destroyed all of them. They also used their increased speed to get up a steep slope leading to the star.
Star #3: Rainbow Cart
This time, the heroes jumped toward the right and found six karts lined up on a rainbow track. The heroes were really excited for this.
Toad: No way! There's a Mario Kart mission?!
Yoshi: Alright!
Waluigi: Imma gonna beat you all!
The six jumped in the karts and took off. The karts here drove automatically, so all they had to do was jump over gaps until they got to the star.
Wario: Well, that was disappointing. The karts moved so slow, there were no items, I couldn't even cut in front of you because the path was so narrow!
Luigi: Eh… it's no real Mario Kart, but I still enjoyed it. At least there were no blue shells.
Mario: Haha! True!
They grabbed their next star. Just two more to go!
Star #4: Rainbow Snakeblock Tour
Long jumping to the tower next to the 8 bit Mario, this was a snakeblock mission, similar to the one back in Livid Surreal Dream. Though this snakeblock was smaller and a bit faster.
Toad: Well, now I regret my wish from last time.
Wario: You think?
As if it weren't challenging enough, they had to dodge rainbow checked platforms, and Thunder Lakitus that got in their way. When they finally reached the final stretch, they had to quickly wall jump off the blocks and a rainbow checkered platform to reach the Star.
Star #5: Chain Chomp Crushing
It was finally time to collect the final star. For this mission, the heroes went inside the disco ball they started on.
The inside of the Disco Ball was basically a disco party ambience with flashlights everywhere, the floor and the ceiling were red checkered patterned and of course a lot of rolling chomps.
For the final star they had to collect, this mission was surprisingly easy. All they had to do was destroy every chomp in the room using the rainbow caps. It was a lot easier said than done, and the Star appeared in the center of the room. Everybody celebrated for finally getting the last star, except for Mario who just stared at the star.
Luigi: Mario? Aren't you excited that we got the last star?
Mario: Well, I am but… I'm just… nervous…
Wario: Nervous? Come on! This isn't anything new to you. You've kicked that big Koopa's butt a gazillion times! And even with my help, once.
Mario: I know, but this isn't Bowser we're facing. We don't even KNOW what Rashay's capable of! But given that he has the power to bring the moon to an impact with the earth, I fear he may be too powerful for us.
Yoshi came over to comfort Mario.
Yoshi: I'll admit… I'm a little nervous about this too. But I was even more nervous back when I was almost at Baby Bowser's Castle, saving you and Luigi. But did I turn back? No! I knew I had to finish this!
Luigi: Bro… you've faced a lot of villains in the past, besides Bowser. Wart (in your dreams), Tatanga, Smithy, Cackletta, Fawful, Grodus, Shadow Queen.
Wario: Don't forget me as well. Haha!
Luigi: I mean, I haven't met most of these villains you've told me about except Cackletta and Fawful, but I faced the Chestnut King once. So that counts for me. Who knows what other villains we'll meet in the future?
Yoshi: But no matter how big of a threat these villains are, we'll always pull through. Because we're a team! A team always sticks together!
Toad: We can do it!
Mario: You… You guys.
They all hugged Mario, except Waluigi, who was getting impatient.
Waluigi: Um… guys? Our planet's at stake?!
Mario: Oh, right!
They grabbed the final star, and teleported out of the level.
Well, the finale draws near…