The Legendary Starfy Hints

Beat Boss mode(can be found in case after you beat mashtooth)in less than 8 minuetes
world ten is FULL of time trials theres a boss you can battle if you beat all levels in little bit amount of time.I never fought the boss of world ten but i bet you can if you try

Sorry I only got to Ronk last time, I accidentally clicked submit too early.
Let's continue where we left off.
Boss 6: Snips
Snips is immune to star spin. All you have to do is
A: Reflect the bombs she throws
B: Let the bombs bounce and wait till they hit her while avoiding them.
Its that simple.
Boss 7: Terrible trio
Ronk, Snips, Papes, all at the same time.
Papes:
The second battle is harder. Papes will charge at you with his sheild. Get behind him and attack. Repeat
Ronk:
Same as papes, just that he charges in a straight line and not with a shield but a damaging fist.
Snips:
Beat her the same way as last time. You can also make her bombs hit Papes and Ronk.
Boss 8: Mashtooth first form.
Use your shooting star on Mashtooth once so he hits the wall. Next time he charges hit him with shooting star twice.
When the small lightning comes, get in between them so the big lightning doesn't hurt you.
Next shooting star him twice, and he's done for.
Final boss: Mashtooth Final Form
Attack his face and dodge the lightning bolts. Then, when he throws rocks, Reflect them and do damage. Repeat.
When the lasers and rocks combine, focus more on the rocks because they are more important.
Next you'll have to beat a laser. Simply press Y as fast as you can. Then comes the second laser. Use your best speed for about five-twelve seconds, then pause the game. Allow about 90 seconds of recovery, then do it again.. Repeat.
That is a very handy trick because you end up pushing the laser little by little.
To unlock world 10, beat boss mode under 8 minutes.
Thats all!

Big bossdown Walkthrough

Bosses
Big Squiddy
Hot Spring Snapper
King Ping
Papes
Ronk
Snips
Terrible trio
Mashtooth First form
Mashtooth Second form
Unlocking World 10

Big bossdown is a Moe's case feature unlocked by beating 8-4.
If you are stuck on an individual boss just go to its chapter.
You may play as starfy or starly, but it doesn't matter.
Because many players find it challenging, this has tips on Mashtooth's laser!
If you want to beat this, I advise You find at least 6 heart gems and have at least seven hearts.
Boss 1: Big Squiddy
This boss is pathetic, but I'll cover it anyways.
Star spin his arms. At most, you can hit the 4 times before he charges an arm at you. Simply star spin it. Then star spin the rock that falls. Next make sure you don't get hit by his arms when they rise. Repeat the process.
You should be able to beat him in about 20 seconds if you are a decent player and don't fool around.
Boss 2: Hot Spring Snapper
Once you get the hang of it, the boss gets easy. (Somtimes its not so easy to get the hang of it!)
Get on the geyser
and land on the hump in his shell. Star spin and knock him to the ground, then land on the bump on his stomach. Repeat.
He has a variety of attacks, but they are all avoidable.
His first attack simply shoots out lava rocks. Dodge them by dashing or going in the air and gliding away.
His second attack sends out fire on the ground. Avoid it by going in the air.
Once you hit him twice, he'll use his thrid attack, which sends out a laser below him. Instead of paniking, simply go in the air and star spin his hump, because that attack leaves him vurnerable.
After hitting hom enough, he'll break the ground an make a waterfall. Siply avoid the rocks and starr spin his stomach.
Boss 3: King Ping
Star Spin his Belly Button, then avoid the snowflakes. Repeat.
After hitting him 6 times, he'll break the ice and fall into the snow. Simply go beneath an icicle while his head is under it, and then get out of the way. When the icicle hits his head, star spin it. Then dodge his attack. Repeat.
Boss 4: Papes
Simply star spin his shield over and over and make him hit the spikes. Its that simple.
On personal note, this fight kind of reminds me of big bully in Super Mario 64 DS.
Boss 5: Ronk
First of all, run and get below the platform Ronk is on. Flood the stage and then Star Spin Ronk from below. Repeat.
The more you hit Ronk, the faster he goes, so it is important that you flood the stage and get under the platform before it completely unfloods.

In the legendary starfy after you beet mashtooth you go to pufftop in the last stage you go to the royal treasure room. at the two doors of the treasure room the two waterfalls before the first door, jump from waterfall to waterfall until you get to the top and there is a door go in and you face ronk again. this time there is a move where a net comes down and you have to star spin your way out.

When you fight the last Boss, watch the small lightning bolts, get inbetween two of them (Don't worry, they don't hurt you!)then, after the big one passes, go for the Boss!

Hope this helped! :)