go to the highest point that you can go then go all the way right it should be near the statue of liberaty
Beat San Fransisco to go to WASHINGTON DC. ( Find 50 coins, bobble head and learn all tricks)
you have to be level 40+
level 1? Really?
the factory is the last level
To reach the second level in Phineas and Ferb for the DS, you need to complete the first level by collecting enough items and completing the tasks associated with it. Once you finish the objectives, the game will unlock the next level. Make sure to pay attention to the hints and items available, as they can help you progress smoothly. Enjoy exploring the adventures of Phineas and Ferb!
That just depends if the level is ferb or perry.......
just roam around i know it sounds stupid but keep looking
you must finish the rollercoaster level
in the water level 4:1
run for your life with Phineas and ferb
In the treehouse
click ALT then F4