Sirena Beach Blue Coins: What Most People Get Wrong

You’re standing on the roof of Hotel Delfino, staring at a sunset that looks like a postcard, and you’re absolutely fuming. I get it. We’ve all been there. You’ve sprayed every palm tree, doused every torch, and ground-pounded until Mario’s knees should be dust, yet you’re still sitting at 29 out of 30. Honestly, Sirena Beach blue coins are the ultimate test of a completionist’s sanity in Super Mario Sunshine.

The game doesn't play fair. Some coins only exist in a specific "slice" of time—meaning if you're in the wrong Episode, that coin literally isn't rendered in the game world. It's not that you're bad at searching; it's that the game is hiding the treasure in a room that doesn't exist yet.

The Episode 7 Trap

Most people assume that because Episode 8 is the "final" version of a level, it has everything. That’s a lie. If you want all 30 Sirena Beach blue coins, you basically have to treat the episodes like a checklist.

Here is the deal: Episode 7 (Shadow Mario Checks In) is actually your best friend for the "timed" graffiti coins. You've probably seen those glowing red Ms or triangles on the walls. When you spray one, a coin pops up somewhere else, and you have to sprint like a madman to grab it before it vanishes. These are notoriously finicky. If you try to do these in Episode 8, sometimes the NPCs or the Red Coin layout messes with your pathing.

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Why Episode 6 is Mandatory

You cannot 100% this stage without visiting Episode 6 (Scrubbing Sirena Beach). This is the one where the beach is covered in electric goop and you have a time limit to clean it.

Look for the Nokis (the little shell people). There are two of them near the lawn chairs and two more near the pool areas that are completely covered in sludge. You have to spray the goop off them until they sparkle. They don't just give you a "thank you"—they give you blue coins. If you skip this episode because the timer is stressful, you’ll never see those four coins.

Inside the Casino: Don't Miss the Flame

The Casino Delfino is a nightmare for a few reasons, mainly because of the slot machines and the general chaos. But there are three specific coins here that people miss constantly.

1. The Torch: On the right side of the casino, there’s a lit torch. Put it out. It’s a classic Mario trope, but in the heat of gambling against King Boo, it’s easy to walk right past.
2. The Slot Machine: There is one specific slot machine on the left-hand side. You need to ground pound the top of it. Not the one next to it. Not the one across from it. Just that one.
3. The M Graffiti: Look up. Above the entrance inside the casino, there’s an M. Spray it.

Actually, a lot of players get stuck on the casino coins because they try to get them during Episode 4. While some are there, Episode 5 (King Boo Down Below) is generally more reliable for the internal casino triggers.

The Attic and the Infamous "Invisible" Coin

The hotel attic is a labyrinth of Boos and fake floors. It’s annoying. You’ve probably spent twenty minutes wandering around up there only to fall through a trapdoor into a room you didn't want to be in.

There is one coin in the attic that is "hidden" in a way that feels like a prank. It’s in a dead-end corner, blending perfectly into the blue-tinted background of the rafters. You won't see a sparkle. You won't see a shadow. You just have to walk into the corner. It's located near the area above the pool, but not directly over the water.

The Room-Hopping Strategy

To get the coins hidden inside the hotel rooms, you have to master the "clipping" through the environment.

• The Bookshelf: In one of the third-floor rooms, spray the bookshelves. One will slide away or reveal a coin.
• The Boo Posters: See those posters with Boos on them? Spray them. They often hide holes in the wall that lead to secret rooms.
• The Furniture: There's a lamp near a sideboard on the third floor. Spray it. Seriously, spray everything. If it looks like decor, it’s probably a coin holder.

Summary of the "Missables"

If you’re stuck at 26, 27, or 28 coins, check these specific spots:

• Underwater: Go to the far left of the beach (facing the hotel) and dive. There’s a coin on the ocean floor near the cliff wall.
• The Sign: Spray the "Hotel Delfino" sign out front.
• The Fire: There are torches at the entrance. Douse the third one from the left.
• The Flowerbed: To the right of the hotel, there’s a circular flowerbed. Spray the center until a coin pops out.
• The Ledge: There is a coin sitting on the backside of the hotel’s second-floor exterior ledge. You have to triple-jump or wall-jump from the cabana to reach it.

Actionable Steps for Your 100% Run

Stop wandering aimlessly. It wastes time and makes you hate the game. Instead:

1. Start with Episode 6: Clean the four Nokis on the beach first. That’s 4 coins out of the way.
2. Jump to Episode 5: Head into the casino and grab the torch, slot machine, and M-graffiti coins.
3. Finish in Episode 7 or 8: Use these episodes to clear the attic, the hotel rooms, and the exterior "M" and "X" graffiti challenges.
4. Use the Map Check: Remember you can press the Z button on your controller (or the equivalent on Switch) while looking at the map to see your total coin count for that specific world. It won't tell you which ones you're missing, but it confirms if you can finally leave this beach forever.

Getting all the Sirena Beach blue coins isn't about skill—it's about patience and knowing exactly which episode contains which secret. Once you grab that 30th coin, head back to Delfino Plaza and trade them in. You've earned it.