15F - Under New Management | Luigi's Mansion 3 100% Walkthrough "18/19" (No Commentary)

In this part, we arrive on the 15F Master Suites, defeat the Boss, Hellen Gravely; save Mario, and obtain all the Gems. We also obtain the final Gems and unlock the Special Item, Suction Shot Type-C (Crystal Plunger), which we can activate from E. Gadd's Gallery. The "Crystal Plunger" gives your Suction Shot a Crystal Plunger instead of the usual one. The last Special Item is the Poltergust Type-G (Golden Poltergust) which turns your Poltergust Gold. This is obtained by completing every Achievement, and I will not be going for it. Collectibles: 11 1. 15F Green Gem (97 of 102 Gems) - 2:48 to 3:12 2. 15F Purple Gem (98 of 102 Gems) - 3:23 to 3:48 3. 15F Grey Gem (99 of 102 Gems) - 11:50 to 12:18 4. Yellow Key - 13:16 to 18:28 5. 15F Red Gem (100 of 102 Gems) - 17:58 to 18:22 6. Green Key - 20:03 to 25:25 7. Blue Key - 26:09 to 29:08 8. 15F Blue Gem (101 of 102 Gems) - 26:55 to 27:37 9. Purple Key - 32:25 to 36:51 10. 15F Yellow Gem (102 of 102 Gems) - 38:20 to 39:10 11. Suction Shot Type-C (Crystal Plunger, All Gems Obtained Reward) Boss: Hellen Gravely - 42:09 Hellen will summon a pillar in the center of the room which can create a laser beam that we need to either outrun or burst over. It can also create a triple laser beam that we must outrun. Lastly, it can also create four different colored barriers that can only be disabled from underground by Gooigi. During the fight, we must have Luigi dodge the laser beams, while Gooigi slips underground through the grates and deactivates the four colored barriers. Once the barriers are down, Hellen will come at us with her mirror and slam it into the ground. Once it's in the ground, we can stun and damage her (Don't do this unless all the barriers are down or she's far enough away from them!). We repeat the entire process until we finally capture her and rescue Mario. Note: While underground, the floor will light up blue to let you know that water will flood that passageway shortly, so make sure you get out of the way before it dissolves Gooigi!