HP with the Metal Cap

Previously, I made a video explaining how Mario’s HP works [ • HP ]. On that video, knavesmith commented: “How do all of these variables react when Mario has the metal cap on?” [ • HP ]. After taking a quick look at it, I realized it was more complicated and interesting than I had originally thought. So, I figured I’d just make a video about it.
In most cases, Mario’s invincible while he’s wearing the metal cap. Almost all things that increase the DEC counter no longer do, except for fall damage. Most things that affect HP directly also no longer do, such as toxic gas and water. However, water still can affect Metal Mario in certain situations, such as right after he jumps into water, right after he receives knockback underwater, and while he’s riding on the water shell underwater. Thus, there are in fact several ways for Metal Mario to die. Also, I didn't mention this in the video, but all the things that affect Mario’s INC counter (e.g. coins, heart spins, air bubbles) still function normally for Metal Mario.

[@HeisBeppo]

The fall damage one seems odd to me. All the other forms of damage require situations that aren't present normally or ones you go out of your way to get, but fall damage isn't hard to take.

[@ThJakester897]

I love the extra cheesey humor you put into the presentation this time. It makes it even more fun for the audience.

[@RarefoilB]

So Metal Man's weakness are: height, burning before switching from his secret identity, and water during special circumstances. The Man of Steel will fall soon.

[@samuelshock6292]

In the DS version, Metal Wario (since you need to be Wario to access the metal cap) doesn't take lava damage OR do the lava boost. THE MORE YOU KNOW

[@DouglasZwick]

Mr. Pannenkoek, this is the most blatant case of fraudulent advertising since my suit against the film

[@chrislink9737]

Bubba the fish CAN eat you... Leading us to another way to die as Metal Mario...

[@Nojical]

Of course Metal Mario can die. You have to defeat him to get to Master Hand, DUUUUUH

[@TehNewV]

Cap Co Ltd is NOT responsible for any damages caused by misuse (falling), shell-riding, or negligence to treat a pre-existing burning condition.

[@greed0599]

Alternative title: "UA-camr intentionally burns, drowns Italian man for his own sick game"

[@aerospherology2001]

Mario coughs because he's so used to it.

[@TheGloriousLobsterEmperor]

7:48

[@PeytonBirbal]

I can't believe in nearly 25 years I've never stayed still in the toxic haze long enough to hear Mario cough or see his death animation there

[@MegamikazeMoriko]

i don't mind the rest of metal mario's weaknesses

[@jackeroni216]

So the first thing you do when you become immortal is try to die?

[@Z10ZeeTen]

Those Inception references got me thinking that Inception would have been so much more interesting if they could go 0.5 levels down at a time, thus helping to conserve the amount of levels down in a full dream run.

[@dootdoodle569]

3:05

[@legendgames128]

"Metal Mario can still get shocked, but this doesn't lower his health."

[@GoldenKingStudio]

And of course he can still fall into a bottomless pit and die, don't forget about that.

[@thegovenor6166]

When a regular player finds out about the metal cap: Hey, this hat makes me invincible, nice!

[@icegod4849]

5:33