How To Beat T Rex Luigi's Mansion 3

Okay, so you're stuck on that T-Rex in Luigi's Mansion 3, huh? Don't worry, friend, we've ALL been there. Seriously, that thing is a nightmare. But fear not! I'm here to tell you how to bring that prehistoric plastic monstrosity down. Grab your Poltergust G-00 and let's get started!
First things first, let's talk strategy. This isn't a straight-up brawl, no no no. We need to use our brains (and maybe a little bit of luck). Forget trying to suck up the T-Rex directly. That's just gonna end in tears. Trust me. Been there, done that, got the (ghostly) T-shirt.
The Boos!
The key to victory here, my friend, are those pesky Boos! Yep, those giggling ghosts are your ammo. Seriously! Who would have thought, right? Luigi using Boos as weapons? It's wild.
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You need to suck up those little spectral spheres with your Poltergust G-00. Aim, inhale, and BAM! Got one! The more, the merrier! Try to get at least two or three Boos locked and loaded.
Now, here's the tricky part. Wait for the T-Rex to get close enough, but not TOO close. You don't want to get chomped! When it's within a good range, unleash those Boos like you're launching ghostly missiles!

Aim for its head! That's the sweet spot. A direct hit will make the T-Rex stumble and reveal a weak point on its chest. It's usually a big ol' flashing red light, you can't miss it.
Now's your chance! Fire off your Poltergust G-00 and suck up that weak spot like your life depends on it! Because, well, it kinda does.
Rinse and Repeat (And Don't Get Eaten!)
That's basically the whole shebang! You'll need to repeat this process a few times. Sounds easy, right? Well, not exactly. That T-Rex doesn't just stand there and take it. It has a few tricks up its... sleeve? Does a T-Rex even have sleeves? Hmm… Anyway!

It'll try to stomp on you. Dodge! The game gives you plenty of warning with those big shadow circles. Don't be a sitting duck!
It'll also try to bite you. Again, dodge! This is where the Suction Shot comes in handy. If you’re feeling fancy (and your timing is impeccable), you can shoot the Suction Shot at its mouth to stun it! Talk about a toothache.

Those little skeletons will also try to get in your way. Don't let them! You can use your Strobulb to stun them or just suck them up with the Poltergust. Prioritize the T-Rex, though. Those skeletons are just a minor annoyance.
Pro Tips for Pro Luigi-ers
Use Gooigi! This is HUGE. Gooigi can slip through the bars around the arena to collect more Boos and avoid attacks. Plus, if Luigi gets caught, Gooigi can take over while Luigi recovers! Teamwork makes the dream work!
Don't be afraid to use your Dark-Light Device! Sometimes hidden items can help you in the battle.

Patience is key! Don't get greedy. Wait for the right moment to strike. A rushed attack is often a failed attack.
Most Importantly: Don’t Give Up! This boss is tough, but with a little practice and a lot of Boos, you'll take that T-Rex down. Imagine the bragging rights!
And that's it! You've now conquered the mighty T-Rex! Go forth and be victorious! You've earned it! High five!
