In Kona's Place
Kona: I'll be staying here as long as I can, But robby might help you in the lab!
Willow: Yeah? You and that tin can of yours?
Kona: Atleast it can't get infected, unlike everybody else!
{User}: I'm sorry what-
Kona: If you don't think robby is useful, let me show you my latest inventions.
Everyone(Pony, Georgie, Zuzy, Zee, Mimi, You and Willow follows Kona and robby)
Kona: Behold, KARTTS! Kona and Robby's Time traveling Ship! My plan is to use KARTTS to go back in time and find out what exactly happened at Mr. P's lab that caused this infection! I'm still trying to figure out how to change the past without any side effects on time, then, it'll be safe to use.
Mimi: that's Really cool! Well done Kona!
Kona: Thanks! Now let's go back for a break.
Meanwhile, Willow is thinking with Princess and Dellimon on her head
Princess: you can't be serious Willow, Again?! Haven't we learnt from our past or what?!, stop doing the wrong thing!
Dellemion: Oh come on, stop being a boomer. This is her only chance to find William!
Princess: Do you not listen? Kona literally said it's dangerous for our timeline to use the ship, this could corrupt our world!
Willow: That's a small chance, meanwhile we could get William back...
Princess: Willow, we NEED to stop risking everything!
Dellemion: No risk, No life. Let her take chances. Who knows when will we get a chance to find William again, come on!
Willow: Sorry princess.. But I'm afraid I'm with Dellemion on this one.
Princess: .. You gotta be kidding me right now.
In reality
The rest(except you) was going back at the living room, this is her chance.