Hey everyone, it's your fellow mobile operator here, and I'm buzzing to talk about the latest undead invasion in Call of Duty Mobile! As the title suggests, Season 9: Zombies Are Back is the Halloween-themed update we've been waiting for, and it brings the classic Shi No Numa map roaring back to life – well, undeath, to be precise. This isn't just a simple rehash, though. The big news is the hidden boss fight, a proper Easter egg that takes us back to the roots of Zombies gameplay. I remember when this map was briefly here back in 2019 before being swapped out for Undead Siege, so having it return with this new secret is a fantastic treat. Even if you played it back then, you'll need to go through the new steps to unlock the mode for the boss battle, so let's break it all down.

First things first, when you boot up the game and download the Season 9 update, there's a small onboarding process. You'll run through a quick tutorial to get reacquainted with the Zombies basics – nothing too crazy. After that, the real key is playing one match of the Classic (normal) Shi No Numa. Your mission? Survive for eight rounds. Do that, and you'll unlock the Hardcore mode. This is the only mode where you can access the boss fight, so consider that eight-round survival your ticket to the main event.

💡 Pro Tip: You can tackle this Easter egg solo or with a squad of four. If you're going solo like I often do, just remember to uncheck the auto-fill option before starting your match!

Alright, let's assume you're in a Hardcore match. The steps to activate the boss can be done early, but the big bad won't actually appear until after round 12. This gives you plenty of time to earn points, get geared up, and prepare. Don't get complacent, though – once you trigger the sequence, you only get a one-minute countdown before the fight begins. During the boss encounter itself, you'll find an ammo resupply box, but perk machines and the Pack-a-Punch will be locked out. Preparation is absolutely everything.

You'll start the match at the top of the main hut. Survive the initial waves until you have 1,000 points to unlock a door. It doesn't matter which door you choose price-wise, but I always go for the stairs for convenience. Head downstairs and start scouring the lower level of the main hut. You're looking for two large, gear-shaped parts on the floor and shelves. They're pretty easy to spot, and you'll get a prompt to pick them up. These are for fixing the broken elevator lift on the upper-level balcony.

Once you have both gear pieces, head up to the balcony. Interact with the red electrical box on the lift – you'll need to do this twice for repairs and a third time to activate it. Hop on, and it'll take you down to a secret underground lab.

From the starting corridor, go left and follow the path to a room filled with large chemical vats. You'll see glass cases with seeds that sprout into eerie, blue glowing plants. Your job is to shoot every single one of these plants until they stop spawning. This step can get chaotic, so clear the area of regular zombies first if you can.

The final activation step is in the nearby room. Look for a machine with a red light; when you get close, you'll see a prompt to "start" it. Hit that, and then your objective changes: survive until round 12 is over. Once you clear round 12, the boss, the Jubokko plant, will make its grand, terrifying entrance.

Now, you can't just walk into this fight with a basic loadout. Here’s what you absolutely need to prioritize during those first 12 rounds:

🛡️ Essential Perks:

• Juggernog: Non-negotiable. More health is a must.

• Double Tap: Doubles your damage output. Crucial for chewing through the boss's massive health pool.

• Stamin-Up (Highly Recommended): Jubokko is fast and aggressive. The extra sprint speed lets you kite it, create space to reload, and avoid getting cornered.

🔫 Weapon & Upgrade Strategy:

The Pack-a-Punch machine is broken at the start, just like the lift. To fix it, you need to find two Electronic Components (small cylinders). These are located in two of the four perk huts at the map's corners. Once repaired, use it! Pack-a-Punch upgrades start at 2,000 points and get more expensive each time.

My Top Weapon Picks for this Fight:

🧤 Other Gear:

• Armor: If you have spare points, grab it from the supply machine on the lower level of the main hut. It starts at 1,000 points.

• Custom Loadout: For 3,000 points at the same machine, you can buy a custom gun from your multiplayer loadouts. This can be a game-changer if you have a specific, fully-kitted weapon you trust.

The Jubokko boss has two health bars. It's a classic bullet sponge that will chase you relentlessly. The strategy is to keep moving, use the environment to your advantage, and focus fire whenever you have a clear shot. Stamin-Up will be your best friend here, letting you stay just ahead of its attacks. Remember the ammo box in the arena—use it wisely to keep your best weapon fed.

It's 2026, and Call of Duty Mobile continues to deliver these deep, engaging PvE experiences that rival the console versions. Unlocking and defeating the Jubokko in Shi No Numa's Hardcore mode is a fantastic challenge that tests your preparation, teamwork, and skill. So gear up, survive those rounds, and show that giant plant who's boss. Good luck, and I'll see you in the fog!