At the title screen, type "Meteor" to unlock the secret Moon level. Alternately, spawn a teleporter. Use it to access the Moon level. -From: Sam Rooke
Spawn a teleporter, and use it to travel to one of the three secret levels.
Type "Time Machine" to spawn a time machine. When you ride in it, you will randomly go to medieval times, prehistoric times, or on top of a space shuttle.
Successfully complete all puzzle and action challenge levels in Advance mode to unlock the original Scribblenauts costume, which is the original design for the main character before he was changed to Maxwell.
Successfully complete a puzzle to have it marked with a Silver Star at the puzzle selection screen. Replay a puzzle marked with a Silver Star to play it in Advance mode. In this mode, you must complete the same level three times in a row using different objects in each attempt. Successfully complete the puzzle in Advance mode to have it marked with a Gold Star at the puzzle selection screen.
At the Sandbox mode title screen, type one of the following words to change the background:
Successfully complete the indicated task to unlock the corresponding merit. Note: You will only get the merit after completing the level.
Write one of the following words to get the indicated item:
The following creature and monster words can be used in the game:
Folkloric creatures
Legendary creatures
Popular Cryptid monsters
H.P. Lovecraft related creatures and objects
Religious figures
Internet memes
You can interact with the following people/creatures as indicated:
Summoning the following magic will have the corresponding effect. Note: Most of these magic objects will not have any effect when used in water. When in contact with water, they will usually vanish.
The game ignores adjectives when writing any word. For example, typing "Tiny Hat" or "Huge Hat" will only be recognized as "Hat", and will spawn the same thing. In Advance mode, the game will not recognize the same word if you put an adjective before the word itself, even though the exact same thing is spawned. You can complete a stage three times by typing "Wings" the first time, "Big Wings" the second time, and "Small Wings" the third time. You will get the Wings all three times, but the game will register three different words and allow it. You do not even have to use a proper adjective because the game does not recognize them. Simply typing "abc Wings" will register as "Wings"; the game will just ignore the "abc".
To easily complete any action level, spawn a pair of handcuffs, and attach them to the Starite found on the level. Then, spawn a vending machine, and place it next to the handcuffed Starite. Attach the other end of the handcuffs to the vending machine, and it should give you the option to "fill" it with the Starite. Once the Starite is in the vending machine, simply drag it to Maxwell, and click it to empty it out. Note: This glitch should also work with other objects that can be filled, such as baskets.
In Level 10-11 in Action mode, walk toward the star and complete the level. You can do this as many times as desired to get a lot of Ollars.
The Blob is immune to all attacks except for some from man-made weapons, such as the flamethrower. It kills dragons, Minotaurs, and even the Grim Reaper. Transport the Blob around the level to defeat enemies one by one to make a clear path.
When a star is behind a barrier, use a rope or jump rope to connect the star to the barrier. It will usually fall through the barrier, or maneuver it so you can pull it through.
Type "Wings", then put them on Maxwell. Any creature you can ride will now be able to briefly fly while you are on it.
Summon the creature's favorite food three times (most of the time it is "meat", but it can differ). Summon a creature. Let him eat the food. When he eats the food three consecutive times, he will fall asleep. Summon a "Saddle". Put the saddle on the creature. Wake the creature by interacting with it. If this does not work, use an "Alarm". When the creature is awake, either tap on the "Saddle" or select the "Ride" option. Note: This trick can also be used on legendary creatures. Some creatures cannot only walk, but also fly or swim underwater. Also, remember that legendary creatures can be very useful to fight against other creatures, but they are not invulnerable. Make sure the food is in range, because the creature in question might attack you. Some animals or creatures can be mounted without the saddle. Alternately, you can use a "Mind Control Device" to mount hostile animals or creatures.
If there are any NPCs that must be killed before you can progress (including bears, crooks, and dinosaurs), you can type "Death" (or any variant thereof, such as "Grim Reaper") and put it next to the enemy. Death will kill anything that lives, including Maxwell and NPCs that you cannot kill. Make sure to put him next to only those you want dead. It addition to being able to use him on multiple enemies without putting yourself in danger, he does not count as a weapon, so you can still get the "No Weapons" merit.
To easily kill a vampire, create a "Sun". It will reduce any vampire to dust and also turn werewolves to human form. Alternately, you can use a "Cross", "Garlic", or "Stake".
If you create a "Pool" or "Ocean", you can use it to keep objects floating, even when you are currently placing it or it is misplaced. This is useful for keeping Starites from falling or to raise them.
Attach handcuffs to a Starite, and place the handcuffs in a vending machine. Then, pick up the vending machine, and move it to you.
During a Challenge mode puzzle, summon a teleporter. Use it to travel to the Scribblenauts staff room. It contains the 5th Cell logo and the avatars of the game designers.
Level 8-11 from the "Frontier" world is clearly inspired by Back To The Future. First, there is a "Mad Scientist" standing on top of a "Courthouse", where there are "Power Lines" connected from it to a tree. There is also a "Stormy Cloud" standing on top of the said tree. The hint is "Timing is everything! Get a charge at Eighty-Eight!", obviously referring to the 88 miles per hour speed the Delorian needs to hit to time travel. To complete this level, you need to get a vehicle to pass through the power lines. Use a monster truck or stick a pole to a car.
Level 9-7 from the "Dark Hollow" world is clearly inspired by BioShock. There is a "Giant" wearing a "Diving Helmet", resembling a Big Daddy, guarding a "Girl", called "Smaller Sister" in the hint (which is a reference to BioShock's "Little Sister"). Also, the level is designed as an underwater city, much like "Rapture" in BioShock.