(Credit to DannyB Plays for the Rejected Updates on this page, as well as his fans and his descriptions of each)[]
The Super Mario Maker 2: Rejected Updates DLC is a free DLC which adds rejected updates to the game. If you make a course using this DLC's features or parts, your course will be labeled REJECTED DLC, and only people with the DLC can play that level. It has had 22 updates to the DLC so far.
Update 1[]
Diagonal Thwomps[]
Thwomps that move diagonal. Enough Said.
Lakitus Throw Anything[]
You can make a Lakitu throw anything. Ex. Bowsers, Bumpers/Donuts, Grinders, Skewers, and EVEN Lakitus!
New Pause Menu[]
No more "Start Over" Button!
Increased Timer[]
You can now set the timer in your level to Infinity!
New Hammer Bro[]
A new Hammer Bro: The Sniper Bro! These Hammer Bros throw hammers directly at you, at high speeds!
Mega Boo Mode[]
A Mega Boo Endless Mode. Every level has a high boo ratio.
Combine Night Themes[]
You can now mix Night Themes! You can have a Windy, Low Gravity Level, or an Upside-Down Dark Water Level!
Combine Clear Conditions[]
You can now have an number of Clear Conditions in your level! You can get the player to have to collect 50 Coins while holding a POW Block and Not touching the ground. Or you could have the player have to defeat 20 Hammer Bros while Frog Mario and without taking damage.
Update 2[]
Metal Mario[]
A Powerup inspired by Metal Mario from Super Mario 64. The only downside is, well, you have actual metal physics. You drop faster and harder on enemies, and you can't jump very high. You can't wall jump in this state either. You also can't ride Yoshi.
Micro Mario[]
Turns you into a tiny red dot, or "Micro Mario".
Turbo Snake[]
A Red Snake Block that moves EXTREMELY fast. You'll have a hard time trying to ride on these snakes.
Anything in Blocks[]
You can now put ANYTHING in blocks, such as Thwomps. You can have a level where every block has a Bowser! You can even have the flag in a hidden block at the end! You can put a checkpoint in a block! You can make blocks that spit out other blocks!
Super World Trolls[]
Pick-A-Pipe[]
You can put a Pick-A-Pipe in your Super World now! When you pick right you gain 5 Lives, but if you pick wrong you lose 5 Lives.
Mushroom House Trolls[]
You can make Troll Mushroom Houses, like an exploding house, a softlock house, or an Off-Screen Thwomp House! You lose 5 lives each time.
Black Hole[]
A Variant of the Angry Sun that when touched, the entire level will disappear, Including the pause menu buttons. There is also a Black Hole theme for each background. Everything becomes black, except for the player.
Update 3[]
Sniper Bowser[]
Acts like the Sniper Bro, except a Variant of Bowser that shoots Fire.
New Scroll Speeds[]
Two New Speeds!
Slug[]
The Slowest Autoscroll Speed. It moves extremely slow and lets you take in the level.
Fighter Jet[]
The Fastest Autoscroll Speed. Extremely Fast, and really hard to control.
Monster Mushroom[]
Makes you grows so big you destroy everything you walk into. Including the goals.
Easy 1-1 Upload[]
A new button on the homescreen called "Upload 1-1". Clicking this button immediately creates a 1-1 Level and Uploads it.
Angry Planet[]
Just like the Angry Sun, but much, much, MUCH bigger. Good luck dodging this beast.
Auto Endless Mode[]
Only Auto Levels. Automatically holds whatever the course title says. Includes an auto next feature, which starts the next without having to press next.
Lightspeed Dash Block[]
You go so fast the camera can't keep up.
Black Pipes[]
Like Red Pipes but send out everything MUCH faster.
Sharp Slopes[]
Steep Slopes so Steep you can't walk up or slide down them.
Update 4[]
New Game Style![]
The mysterious new Game Style hinted at all this time... HOTEL MARIO! You can add tons of doors, elevators, Koopas, Goombas, Coins, and you can play your very own Hotel Level! It will still be available in all background styles, such as Ghost House, Underground, and Castle!
Meowser in All Styles![]
Added to all 5 other styles!
Cheeseburger Powerup[]
It will cause Mario to gain weight, move slower, not jump as high, and kill enemies without jumping off a ledge. You can eat more than one, and gain more weight. If you eat too many, you will die of a heart attack.
Snake Thwomp[]
Thwomps that act like Snake Blocks, and move like such.
Upload Without Clear[]
You've been smart putting hidden dev blocks to a door to the end, but now it will be easier. You don't need to do a clear check anymore to upload your level. There is no way this feature will be abused. At All.
Nuclear Bob-omb[]
The Big Bob-omb but bigger, and will destroy everything 12 blocks away from him.
Tantrum Boom Boom[]
A Red Boom Boom. A WAY harder version of Boom Boom, as he acts like a toddler having a tantrum.
Voice Chat in Multiplayer[]
This could not be a bad idea at all. Right?
New Sound Effects[]
New Sound Effects for your levels, like "Alarm Clock", or Blurring the Screen, and you can finally, FINALLY Rickroll someone when you troll them!
Update 5[]
Forward/Z-Axis Thwomps[]
Thwomps that when activated, move forward to the screen and break it.
Night Switches[]
A switch that changes the night theme of the level when hitting it.
Goomba Powerup[]
You can only walk. No Jumps, and increased weight. Lots of Fun!
Microtransactions[]
Oh Boy, Microtransactions. Here we go. You can buy more lives, such as 10 lives for $2! You can buy a mushroom for 99 cents! You can purchase a door the flagpole! If you do this, under your name on the clear list will show a coin icon, to show you used microtransactions. You can remove the icon for $3!
New Game Style[]
Another New Game Style is here! It is.... Mario Odyssey! You can now create levels based on Odyssey's 8-Bit side scroller minigames! Because fans were upset that many items and enemies are exclusive to only 3D world, we have decided that for this Game Style... will not have any unique items! It's basically the Mario 1 game style but looks a bit different!
Meowser in a Car[]
Now we have Meowser in a Car!
Lava Suit[]
A suit that lets you swim in lava! Except... you can't see anything.
100 Person Multiplayer[]
Speaks for itself. Not our fault if you lag.
Update 6[]
Fury Bowser[]
We're putting Fury Bowser into all the gamemodes! We're also including him as his actual huge size, and we're adding giant flames that cover the screen instead of Bowser fireballs.
Angry Tornado[]
We know everyone loves the twister, so we're adding the angry tornado! it'll suck you in and everything else around it!
1 Player Versus[]
Lag has been a bad thing in online play, and Nintendo has never done anything to fix it! But not anymore because we're introducing 1 Player versus mode! You can now play through all the versus levels, but if you get any lag, you'll only have yourself to blame!
Blue Shell[]
People are really bad at Online play, so we're adding the Blue Shell from Mario Kart! Now if you're in 4th place, all enemies turns into a Blue Koopa, so you can kill the player in the lead. This is also fun if somebody is waiting at the Flagpole!
RTX Mode[]
When turned on, you can make the entire game super Realistic and not bad at all!
Rabid Chain Chomps[]
They are like regular Chain Chomps except they fly off their post REALLY quickly like a bullet bill in the direction Mario is facing! If you wait too long, they will fly off the chain right at you!
Reverse Donuts[]
If you step on them for long enough, they will go up and can crush you!
A New Port![]
Good news for everyone still playing the Wii U, (which to be honest who even is?) We are porting the game to the Wii U! The port will be a "Lite" edition, which only removes a couple of features, including: Endless Mode, Online Play, World Maker, Ninji Speedruns, Story Mode, 3D World, the four new backgrounds, All night themes, and only the new enemies, items, and power-ups. Oh, and slopes. You still get the fun intro animations though!
Crappy Powerup[]
Everyone wants the Cappy powerup, but our developers need time off and it would take too much time, so instead, we'll give you... the CRAPPY POWERUP! It looks like the Cappy powerup, except... well... it doesn't do anything. Like, at all.
Update 7[]
Another New Game Style![]
We are finally adding a new game mode! Guess what, this time, the game mode is Mario Teaches Typing! However, instead of playing with your joy-cons, you need to connect your keyboard to your Switch! Now you will only need to beat levels by typing!
New Stickers![]
Until now, stickers could only show what you thought about a good or difficult level, but you've had none that you could put on bad levels. Now we are adding new, negative stickers! Including stickers like "Make it Stop!", showing where a dev block is located, or just to stay away from the level. Or that the level is a dumpster fire.
All Blocks Invisible![]
Hidden blocks have been a part of Mario since the very beginning. Now, all of the blocks have the option to be hidden! There will be so many great levels that use this feature! So cool!
Motion Controls[]
What would it be like to act out Mario's moves? Now you will find out! Introducing... THE MARIO MAKER MOTION MODE (MMMM)! Just plug in a USB camera, act out what you want Mario to do. Just don't give yourself a heart attack!
Gas Tank for Koopa Car[]
Wouldn't it be great if the Koopa Car was more realistic? We are now adding a gas tank to the car! When you drive, the gas meter will go from Full to Empty, and as you approach Empty, the car starts slowing down and smoking, and three seconds later, the car EXPLODES!
Infinite Doors[]
Since only being able to have 4 doors is super limiting, we are now adding unlimited doors! Infinite Possibilities! So much fun!
New Coin[]
You've already seen the 10, 30, and 50 coins, but now get ready for the nicest coin you've ever seen... the 69 coin! Nice. When you collect the coin, all enemies on screen will pause and say "Nice". Even Bowser.
Longer Firebars[]
Firebars are so limiting in their length. That's why we added to option to make firebars as long as you want!