Sirena 5

Sirena 5 is another notorious level, since you only have a 34.3% chance of getting perfect RNG.

Video Explanation

Perfect cycles are: Fruit🍍, Not Fruit❌, Fruit🍍, Not Fruit❌, Fruit🍍. (if not going for Cycle Skips)

Slot Statistics - Click for Details

Chance of getting a fruit cycle is 70% until going to 3 health or below.

Row = What was last spawned
Column = What will be spawned next

Entering the Fight

Instant Elevator Trigger - Click for Details

There is a small area you are able to get a ground pound that instantly triggers the elevator as shown in the video.

The Fight

The second the fight starts and you gain control of Mario, you notice FoundYourGun do a backflip dive into the center of the arena. This is a trick called laugh skip and saves ~2 seconds. This also makes the hitboxes for the purple buttons much larger (for some reason).

Once you take control of Mario, backflip dive into the center of the arena to activate laugh skip.
You can optionally ground pound the purple squares to stop the rotation of the roulette wheels to make grabbing the fruit easier.
Spray King Boo the second he comes out of the ground.
1. If you get a Fruit🍍 cycle for the first roll, this is optimal.
2. If you get a Not Fruit❌ for the first roll, or when you should optimally get a Fruit🍍 cycle, this is an extra NON-MANDATORY cycle and you can cancel it the moment you notice the slot not stopping on fruit.
3. If you get a Fruit🍍 cycle, then a Not Fruit❌ cycle after, this is an extra MANDATORY cycle, and you have to wait until the enemies spawn before cancelling the cycle.
As stated before, optimally the cycles are: Fruit🍍, Not Fruit❌, Fruit🍍, Not Fruit❌, Fruit🍍. (if not going for Cycle Skips)
Once you get a Fruit🍍 cycle, grab a pepper and throw it into King Boo’s tongue.
After he reacts to the pepper, throw a normal fruit at King Boo.
Repeat this 3 times.

Important tips:

Aim to throw the pepper at his tongue.
Each fruit has a different throw arc. Learn them.
You can hover into a durian if its placement is convenient for a quick fruit launch after throwing a pepper.

Cycle Skips

Explanation - Click for Details

An RNG strat that loses about 2 seconds each time you go for it, but has the potential to save around 10 seconds each time you get it. Getting a cycle skip is a 1/64 chance, is pure luck, and you need to do it twice to save up to 20 seconds (getting it twice is 1/4096 or a 0.017% chance). Samu was lucky enough to get it around 7th try, and AverageTrey grinded for it for 18 months before he got it.

To go for it, you simply need to run under King Boo right when he starts to spin his slots after being sprayed on a Not Fruit❌ cycle. When you run under King Boo while his slots are spinning, you will get a roll once King Boo reappears. On its own this wouldn’t be useful, but whenever King Boo reappears, his slots are set to random positions regardless of the normal cycle rules. So if this is done while the slots are spinning, you will get a cycle based on those random positions, with some possible leftover rotation if the slots don’t have time to stop before King Boo reappears.