If you want to ride aggressive monsters, simply throw a Cupid Arrow at them.

I've ridden a Robosaur, T-Rex, and even Cthulu.

Stuck in a deep pit that your jetpack, jetboots, wings, or copter backpack can't get you out of?
Helicopters, jets, and rockets can't fit in that pit?

Simply create a Roc and ride your way to freedom.

Creating a stage that needs loyal guardians of Starites?

Type down Scribblenauts and you'll create robot-looking people who don't react to anything......... UNTIL they see a starite.
These drones will attack ANYTHING that gets near a starite. Including enemies originally placed there to protect it.