Do Bonus Chests do anything?

Hey all,

I realise this is a long shot as from appearances this forum doesn't look too active these days (which is a shame) but I can't find any info anywhere else so hopefully this reaches someone still on here whos knowledgeable on these things.

So my question is regarding Bonus Chests, like the ones in Toad House levels, but i find this applies to any and all of them.

They work, in the sense that Toad says pick a box, and when you open one, the relevant item inside floats up to the top of the screen then puffs away in a cloud of smoke, but the only item that seems to actually DO anything is the 1UP mushroom (havent tried any of the other 'Lives' mushrooms like 3UP for example but i'm going to guess they would work the same) but everything else like Red Mushroom, Flower, Leaf etc just disappears.
Mario doesn't change into the relevant form.
The item doesn't appear in the top item box.
Nothing comes down if in the next level I press Spacebar.

So my question:

Am I missing something, or are Bonus Chests just for cosmetic effect?

I just hope theres still some life in this forum to reach someone...............

First off, it's good to see more people using the forums, hopefully you will be active!

Now to answer your question.
The item that comes out of a bonus chest goes to your world map inventory.
You can access that by pressing the run button on the world map.

Ahh, well there you go!
I never would have known to do that. (check on the map screen by pressing run).

Admittedly, i have not played much SMB so if thats typical of the game that would explain my misunderstanding and what was probably a silly question to many! lol

On another note, one more quick question (no point creating a whole thread for a quick anwer), is it possible to have bosses end the level the moment they are killed without having to use a ?, flag or door?
i'm going to guess not but figured id check.

Eh, don't worry about it. simple mistake! also as for the boss thing i don't think so.

Two more quick questions, one semi related, the other not so much but i felt it would be wrong to make an entire thread for it.

1) Again, potentially showing my lack of SMB knowledge but, what do Bonus Stages do?
The ones with the 'matching image' mechanic. Didn't seem to get anything once I matched them.
(Yep, also checked the map inventory)

2) Is it possible to customise the ending screen? Change the music/image displayed.

The image matching minigames give you extra lives

As for the credits i really don't know, i'm sure you can by editing the game's files but there is no way that i know of without messing with the games files.

Also do you have discord? if you do why not join the MB discord server! https://discord.gg/2NHdXer