Well the only viable method I know is Nadi Lai's game mods. This of course costs 10$ to activate. You the get mod points which you can use to spend on game mods.
There are no cheats but there were a few exploits not shure if they still work
"Monsters vs Aliens" had a March 27, 2009release date .
Monsters vs. Aliens.
The duration of Monsters vs. Aliens is 1.57 hours.
Sandra won survivor heroes vs villians. Sandra is a villain
Monsters vs. Aliens was created on 2011-10-24.
The Navy vs. the Night Monsters was created in 1966.
The Production Budget for Monsters vs. Aliens was $175,000,000.
Survivor: Heroes vs. Villains was filmed in Upolu, Samoa.
Seth Rogen is the voice of B.O.B in Monsters vs. Aliens.
You can't get free membership on pets vs monsters,you have to buy it.
The duration of The Navy vs. the Night Monsters is 1.45 hours.