The "Toy Dimension" is a dimension first seen in the DS version of "Phineas and Ferb: Across the 2nd Dimension (video game)". It comes after the Haunted Dimension.
The gang get here and look around. Doofenshmirtz becomes glad that they're no longer on a dimension that has monsters in it.
After battling Platyborg, The gang get enough energy to go back to their town...just not in the same state.
The dimension, as It's name implies, is composed msotly of toys. Trains with Doofenshmirtz-2's can be seen on the background, along with many other types of toys.