This is the day when the Spongebob Squarepants characters and Phineas and Ferb characters meet! (Candace): Mom! You got to come outside! Now! (Linda): Ok, Candace. Doofensmirtz's invention hits P&F's invention (Linda): (gets outside) Ok, Candace. What did you want me to see? (Candace): Oh come on! It was here just now! (Phineas): So, Ferb. That was a good day! Man, one of these days we go to make a World Transporter...Ferb, I know what we're gonna do tonight! (sees Perry) Oh, there you are, Perry. (Perry): (makes chattering noise) (a few hours later, Perry's watch starts beeping) (the next day)