To beat level 9 on theAstro side type fat wallet on the menu and you will get 50,000 credits. [In case you don't know what credits means, it means dollars.]And type awesome, clearskies, newbie.Plus also type elton.That should bring you to level 9. Then You fly over to the boxes.Click on the drop ship and click it again.Get the engineer over to the boxes.It should appear as a jetpack guy.fly over to every one of the boxes without getting shot. Then you fly the jetpack guys to the energy generators.Destroy all of them.Now you destroy the Alien's defence and get the dropship over to the building that is not destroyed.Now that the dropship is safe from getting destroyed, you can get the engineer into the the building.
touch the crate near the rocket without getting killed
to beat it you need the cheat code:newbie
beat the villain mission with her and the penguin
you try to beat it
You unlock Killer Croc, after completing the Harbor Docks level.
beat the first level.
you beat numb chuck's mission to kill a dragon
very carefully...
peanut butter
...By Defeating The Geonosians...
If you mean unlocking more things, beat the level before it or Act I of the story above it.
beat all epesodes and buy all the bouty hunters