The First Ever Super Mario Bros. Romhack 

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Seeing a hack this sophisticated made in 1987 is like learning the ancient Greeks invented the steam engine.

The fact there is a Mario romhack that's older than SMB3 is mind blowing lol

I'm legitimately amazed at how technically sound this hack is in comparison to modern hacks, given the technology and knowledge base available at the time.

Free bingo square: "How many people have ever [verb] this [thing]?"

1:33 that chain of flagpole balls is now known to be an unused object, for this hack from 1987 to find it and no one realizing this for decades is insane

This was clearly made by someone who looked at The Lost Levels and thought "Still not hard enough."

For a romhack being made in 1987 this is actually technically impressive. Of course now you can add custom sprites and stuff and just completely change super mario bros but back then this was insane.

This is awesome level design and the fact they knew about the glitches and compensated for a player doing them is awesome. Definitely an awesome hack. Way ahead of its time. Shout out to the devs of the hack and Kosmic for making it really fun to watch

What the heck, I was expecting a super basic rom hack but what I've watched is among the best I've seen in all these rom hack Wednesday videos. How is this 7 years older than me holy crap.

Imagine if you could find the creator of this and have like a conversation about mario with him. Would be amazing content to see how much he remembers 35 years later

The joy in every trick he does even when he’s done it a million times is so infectious, so fun to watch these!

I like how some sections of some levels are taken from lost levels 0:51 - having the turtle on top of the bricks in 1-1 9:32 - this section being the start of 4-1 16:12 - this section being the start of 4-2 22:09 - this section being 7-4 (as kosmic said lol) 22:44 - this one looks a bit like 4-4 to me P.S. Thanks for making a playlist and even a spreadsheet for the rom hacks! I appreciate the effort put into it.

If the same person made the tool and the hack, I wouldn’t be completely surprised it turned out as exploit-reliant as it did, just because they would have had such a detailed understanding of the game from making the tool.

This romhack was way, WAY ahead of its time.

Imagine being in the late 1980s and getting this weird disk with an edited version of Super Mario Bros. on it. It must have been insane to play a full level hack of one of the best games at the time without even knowing how significant it is. That's like playing a full level hack of New Super Mario Bros. U Deluxe ROM hack on the Switch today.

I wouldn't be surprised if it took literally years for anyone to beat this hack due to how niche and unknown many of these glitches were in the 80s. As far as I know it took until people actually started speedrunning SMB for them to discover things like walljumps, block clips, etc. Also the half invisible blocks are insane

I lost it at the kaizo block, followed by offscreen bowser fire. Mario Maker creators are reusing trolls that are older than I am. XD

its actually insane that they knew all of these glitches in 1987

been thinking about this romhack non-stop ever since this vid dropped. it's been nearly 40 years and we're still making mario levels that look like this! I wonder if the creator is still around and what they think about mario maker if so.

There might have been some "hacks" of early atari 2600 games. However, none of them would be as sophisticated as this. It's crazy that someone figured out how to make this in 1987. I wonder if the creator was linked to SMB1's development somehow.

They literally made you work for that warp zone. XD This is definitely a piece of history right here!

00:22 "Dude it's raw mac Wednesday" - the closed captions Please cook your mac & cheese before you eat it.

The fact that this was made before Super Mario Bros 3 blows my goddamn mind. Amazing hack considering when it was made.

This is actually the best hack I’ve watched you play.

man this is one of the coolest smb1 hacks ive ever seen like yeah theres definitely more crazy or impressive stuff gameplaywise but the fact this was made in 1987 and how you describe it being made and how its full of crazy glitches and weird stuff that like nobody has ever known about, and the weird like labyrinthine nature of going back to previous sections from other levels and... its just absolutely insane and weird and i dig it hard

Dude 😎 it is super cool of you to put together the romhack list with download links. Good stuff my man.

Today I learned I'm as old as the first Kaizo block. This is insane!

It's honestly pretty awesome that you took the time and effort to not only make a playlist but also making an excel spreadsheet with all the hacks AND a link to a tutorial on how to apply them. That's rad.

Definitely read the article by glitchcat7 in the description if you're a technical person and want to learn more about Tonkachi, which was an on console editor. You had to do all of your modifications using the controller directly to the game ROM, there was no sort of even remotely modern coding environment or anything like that coupled along with it - just some variously inaccurate information about SMB in a short manual. From the sounds of things, it was insanely laborious to use, but FDS games being on disks just *barely* made Tonkachi editor, and this, possible. With that context it makes me appreciate the hack all the more. The fact that they not only knew all of the bugs and quirks used in this hack in '87, but made this using such a primitive coding tool is absolutely mind boggling. They must have really loved SMB, it must have been a labor of love for this person.

Kosmic has kept the tradition up with wall clips, soft locks, and 8000 point shell kick.

This was extremely fun to watch, thanks mate! Also pretty happy to see that stuff like that, after so many years, has been preserved.

first i caught the playlist when it was fresh out of the oven, now this video, wtf

With this creator's knowledge of the game all the way back in 1987 imagine if they started tasing Super Mario Bros in the 90's. They would have been so far ahead of the earliest speedrunners it would have been insane.

I've known about some crazy stuff in SMB, but seeing it like this and by a grandmaster really showed something incredible. This was an extrodinary run!

This video was a ton of fun to watch! You have some real skill in _Super Mario_ and a lot of knowledge, too, Kosmic! I may have to watch more of your stuff if it's all this great~

My grandfather made this I'm so proud that still people playing it today ty

It's interesting that someone, back in 1987, before SMB3 was even released, someone decided to, not just make a ROM Hack of SMB1, but add glitch abuse, kaizo-like mechanics, and looping through levels of all things.

Always love the rom hack wednesday vids :) this one was super dope, keep up the great work dude

Thanks for the playlist and spreadsheet Kosmic!!! That is epic

Honestly very happy for this video. Thank you for the playlist!

Yo Kosmic, thanks for the tip at the head of this video that talks about where to obtain all the hacks! I've been wanting to try some of these for a long time. I appreciate your dedication to this ancient game and look forward to your new RU-vid posts often. Thank you!

Thank you for all your hard work making this super accessible!

Wow, this is incredible. Thank you for showing it off for us all to enjoy :) I hope whoever made this got some high paying gig in computing based off of his passion.

This was extremely cool! Great explanations and very neat to see this.

IS THAT THE ROMHACK OF ‘87?!

This hack is fascinating!!! Thanks for showing off as much as you could.

Wow. This is the 1st video of yours I have seen. Nice play through. It’s amazing they did this in 1987. How was it even distributed? Like old school tape-trading? Was there some Japanese magazine that it was mentioned in?

I’ve seen over 20 of your rom hack videos and this is the craziest most amazing SMB I’ve seen. In all these years no one’s topped it I guess. Lol

I didn't even know rom hacks nearly double my age existed.

I'm very impressed that this was made so early and that it's not even that trashy.

Your laugh’s infections, man. It’s always refreshing to see so much positivity on here. Keep it up man.

Amazing hack and awesome playlist. i can't wait to dive into these on my series x.

This dude deserves way more subscribers for the entertaining content he puts out

3-4 is just when Bowser is busy filing his Taxes when Mario arrives.

The reason that one castle block is solid is to act as a marker for when Mario goes into the castle and tells the system when to put Mario behind the background. Just a little bit of technical info for you guys 😉

Wow. This was true kaizo. You needed all kinds of advanced skills to beat it. Awesome hack

This is just a baby making a whole video game in a day. Edit: just realised the flimsy lifts in the ground could have been thought to be like quicksand Edit 2: this is the real lost levels

I though the first rom hack would be from like 1998 or something. 1987? That is incredible

Wow! This really blew my mind. What a gem.

This is impressive for how old this thing is. Thanks for sharing this.

An upload from kosmic is a day maker for me!

The history link in the description was great!

Wow, trolls, twice twice, kaizo blocks, wrong warps, I mean stuff that people "discovered" in recent history done all the way back in 1987. Wow. All that plus the fact you had to manually hack the rom. Really impressed with this. Thanks for sharing kosmic!

Yoooo playlist hype. Spreadsheet is great too

This was the best rom hack ever and it is so freakin' good. I can't even imagine the work they've put in to this in 87 ...

The clipping through walls thing on the moving platform (11:30) is based on continuously holding left. It triggers the mechanic that pushes Mario opposite of where he's trying to walk (collision).

This was an amazing watch!

been watching a little mario every morning, thanks for the content Kosmic R)

The fact that this was such a complex mod made before the internet was a thing where people could easily share information, that's amazing! And I guess also goes to show that, before the internet, people actually used to have conversations about this type of stuff IRL with people they found in meatspace with similar interests. Seems a wild concept today! But I guess also it's a Japanese game and the larger cities in Japan are _so big_ in terms of population (IIRC Tokyo has more people than the entirety of my country, Australia) that it's probably a lot easier to find likeminded people IRL to create those kinds of communities which we now usually seek online

This was such a trip. I gotta wonder what other secrets and Easter eggs there might be hidden in the depths of this hack!

This video is so much fun to watch while high 😂 this man is just casually walking through walls and jumping off of the air while his surroundings are going nuts. This was made _by_ a crazy nerd _for_ other crazy nerds.

insane on how he still posts. came here from your bullet bill glitch video from 5 years ago.

This is super imaginative. And made in 1987?! That's madness, and I'm totally here for it.

13:00 that made me laugh so hard that my back cracked, that was amazing. And the glitch was pretty cool too

Seeing this is so cool, the dev had to have put sooo much work into making it this good! Right at the end you asked if this was the first ever romhack, I dunno if you meant for any game but the story of Ms. Pac-Man is interesting and started because of a romhack in like '82, you should look into that

I'd love to see an interview with who made this hack. This is incredible.

This hack is absolute genius and the fact this was done in 87 blows my mind

This is so awesome dude

Awesome hack, Kosmic! Saw earlier the complete 2h video on the twitch!

Dang, I've been following the NES Rom Hacking scene since the end of the 90s, I had no idea that Japanese super mario bros scene went this far back in time.

"Water bowser isn't real. He can't hurt you." Water Bowser: 26:52

Normally i don’t care about those SMB1 rom hacks,but this one is definitely mind blowing,considering it’s from 1987 and it was also very forward thinking with elements never seen before in certain theme levels such as scale platforms in a fortress level or blicks under water etc,,,

the guy who made this rom hack is 100% a time traveler

The St. Andrews of ROMhacks, if you will. I hope Tonkachi means "fever dream" because wow, some of the random stuff that happened on your playthrough was WILD. I had NO idea ROMhacking went back that far. 1987 was the year Doug Williams was Superbowl MVP. Ronald Reagan was still US President when this came out. Amazing to think.

For the 1-5 trick They seem to be able to load other levels, so what I'd do it put the end of the castle in 1-5 and have the loading zone load 1-5 data without you realizing, allowing for 1-5 to be fixed without redundant data.

Such a fun and interesting hack :)

Those dots acting as ladders made me laugh with that sound.

This IS super impressive, wow

The first Romhack, and after 34 years still the best by a mile.

6:50 Did this man really invent the castle back door?!

25:58 YOU FORGOT the new strange Mario bros Romhack that also allow you to star kill bowser

Full romhack Playlist LETS GOOOOO

So this is the first ever Super Mario Bros. romhack.This is awesome! It should be on the famiclones

Kosmic, maybe you should do a speedrun fail compilation for the people who can't go on Twitch, still good job man!

Those “vines” made of brown spheres that Mario can climb up and down are actually a scrapped object that was left in the original game’s code (the original idea was to have them hanging from the tree tops, Donkey Kong, Jr. style). This implies that the developers of this hack knew of their existence and intended purpose somehow

It would be a lot of fun to watch you do a few streams Speedrunning this. You could try to figure out the quickest path and embrace the entirety of the jank.

Holy Smokes, 4-2 (at 15:02) reminds me so much of Super Mario Land (World 3-3 mostly)

The oldest SMB hacks I remember were from an "alternative" console about 20 years ago that came with a lot of modified Mario games (like "100 in 1") including "Fly Mario" that was simply a normal SMB that could fly (actually swim) freely

The idea of a proto-romhacker leaving a kaizo block behind in 1987 only for a SMB world-record holder from halfway across the world to blunder into it in 2021 is trippy.