A possible summary is:
Jeffy is unhappy with his 16th birthday party because his dad Mario got him a beat-up car and three cupcakes. Super D, Rosalina's ex-boyfriend and a superhero, shows up and gives Jeffy a better car and a bigger cake. However, Super D turns out to be a super villain who stole the car and evades taxes. Jeffy gets arrested for driving the stolen car, but the cop lets him go if they throw him a birthday party too. Jeffy and Rosalina apologize to Mario for being ungrateful and they all celebrate together. Scooter interrupts them twice with his nonsense.
Some possible facts extracted from the text are:
1. Jeffy is celebrating his 16th birthday party.
2. Mario bought Jeffy a beat-up red Porsche as his first car.
3. Rosalina's ex-boyfriend Super D showed up uninvited and used his superpowers to impress Jeffy and Rosalina.
4. Super D stole a car from a dealership and gave it to Jeffy as a birthday present.
5. Jeffy got arrested for driving the stolen car and Super D flew away.
6. The cop agreed to let Jeffy go if they threw him the best birthday party ever.
7. Jeffy apologized to Mario for being ungrateful and realized he loved him.