2nd Dimension Isabella Garcia-Shapiro is the 2nd Dimension counterpart of Isabella Garcia-Shapiro. She is the second-in-command of The Resistance trying to defeat Heinz Doofenshmirtz and the leader of the Firestorm Girls branch, specifically Troop 46231. She was originally voiced by Alyson Stoner in Phineas and Ferb the Movie: Across the 2nd Dimension, but was later currently voiced by Nika Futterman. She also has a flaming hatred to Isabella, as 2D Isabella tries to destroy Isabella, but Isabella was way too cheerful to die.