Phineas & Ferb: The Dark Star (Sequel To Phineas & Ferb Across The 2nd Dimension

There was an ancient relic buried deep in The Tri-State Area 2nd. It was called...
The Dark Star.
Legend has it was the most darkest relic, with the power to destroy all dimensions.
It feared many people. However, before the rein and defeat of Dr. Doof 2nd, there were the star sprites...
They sealed away the Dark star,
Until today.
Who would want this relic anyway? I mean like, it's impossible to find now!
Or is it?
Would someone from another world seek it?
Somewhere in... Dimension D? (Hinting a character crossover from Super Paper Mario)
Or, could it be the mischievous Fawful (From Mario & Luigi: Bowsers Inside Story)
Who knows? Only time will tell...
If it was from dimension D, would the lost couple be found (hinting more characters from Super Paper Mario)
Danville is home to Phineas, Ferb, Isabella, Buford, Beljeet (Idk how to spell #YOLO), and many more.
Will they remember the best day ever?! Will their 2nd dimension friends help? Is Agent P here?
Only time will tell...