Shiny From Mushroom:
Pick mushrooms and you will get more shiny. They can grow back every day.
Project X:
If you throw in the Project X and then throw the putty on it from your catapult it will make them invincible for a while.
Hint for Backyard Monsters:
If you get the monster baiter, you can get a monster to try and defend your place. If it seems like defeat is close, press the button that will scare them away.
The Genie has more
Backyard Monsters Cheats at CheatingDome.com.