Across the Second Dimension Alternate Ending

After defeating Alt. Doofenshmirtz's giant robot lookalike, Phineas and Ferb along with Alt. Phineas and Ferb seemingly get crushed by the scrap metal of the robot when it explodes. Alt. Doofenshmirtz tries to crawl away from the scene but is arrested by the SSSN. Everyone looked at the scrap metal pile mourning for the loss of their friends especailly both Isabellas. Doofenshmirtz and Perry blame themselves for their "deaths" (for if Doof never built the Otherdimensionator or if Perry told them the truth sooner none of this would of ever happen) while Candace holds Jeremy in sorrow (both Candaces, both Jeremys) feeling guilty herself for being so selfish and Buford and Alt. Buford angerily pounded stuff shouting "It should of been me (3x at the same time)". Roger then declares to build statues of them in honor of sacrificing themselves to save Danville. Isabella was crying on the scrap metal saying "Phineas...my Phineas...is gone...and I never even got the chance to tell him that I loved him." Just as they were mourning, both Phineases and both Ferbs rose from the metal. Phineas said to Isabella, "Is that how you always felt about me?" having overheard what Isabella said. And as everyone one at a time realized what had happened, Isabella still mourning said, "Yes, yes it is." Phineas shocked about this gave Isabella a hug making her realized that Phineas and Ferb and their alternate selves were still alive. She hugged him back in instant joy as everyone cheered for Phineas and Ferb. Afterwards, the alternate duplicates went back to the 2nd Dimension to take care of the corruption Alt. Doofenshmirtz has placed upon the Tri-State Area. And with the day saved and everything put back to normal everyone break out into song and dance in "That's What Summer Means (Summer Season)" ending the movie.