A possible concise summary is:
Rebecca and her friends confront Robbie Rob, who reveals he was working with Daniel, thinking he was helping the Game Master Network. They find out Daniel has been betraying them since Ninja Turtles and has a plan to recruit other YouTubers to the Red Hood Spies. They also learn that Robbie Rob helped them escape from Home Alone and was the Red Hood in the Try Not to Laugh challenge. Daniel sends them a video of Blackjack and tells them to get inside the house. They find Blackjack with a note that says "Nighty Night" and then they all fall asleep.
Here are the key facts extracted from the text:
1. Robbie Rob is a Red Hood spy who has been working with Daniel.
2. Robbie Rob was tricked by Daniel into thinking he would join the Game Master Network (GMN).
3. Robbie Rob's first task for Daniel was to check out the house while the Game Master was getting his memories back.
4. Robbie Rob was also involved in a prank where he flew a drone to spy on someone.
5. Robbie Rob helped Daniel reset the security system in the kitchen to make it seem like the Game Master was sending gifts.
6. Robbie Rob wore a Frozen costume to get information from Mr. X.
7. Robbie Rob's darkest secret is that he peed his pants in fifth grade and blamed it on another kid.
8. Robbie Rob was not actually a mermaid trainer, but rather was told by Daniel to come to the mermaid challenge.
9. Robbie Rob asked if anyone was inside the house during the mermaid challenge because Daniel needed them to stay out of the house.
10. Robbie Rob went into the house during the underwater challenge and reset the security system.
11. Robbie Rob was wearing a Red Hood disguise during the "Try Not to Laugh" challenge.
12. Robbie Rob helped the group escape from the lockdown by putting them in a room with a tunnel that led to the hacker room.
13. Robbie Rob hit a Red Hood spy to prevent him from getting to the group.
14. Robbie Rob tried to save Matt from facing his biggest fear.
15. Robbie Rob let Matt beat him up to save him from jumping.
16. The gift with the Game Master t-shirt was actually from Daniel, not the Game Master.
17. Robbie Rob is not actually a part of the Game Master Network.
18. Daniel was disguised as the Porch Pirate and stole a package from Piper Raquel's house.
19. The package was brought to the water park to trade with Mr. Nice Guy.
20. Robbie Rob is willing to supply information to help the group stop Daniel's plan.