In bonnie's room, the toys were blowing a massive bubble with Mrs. Potato Head holding the bubble wand in front of a toy fan Jessie held, making the bubble bigger and bigger with Bonnie watching
Toys: (chanting) Go! Go! Go! Go!
That is until Rex came in, popping the bubble and disrupting their fun.
Rex: Look out! You'll get soap on the floor!
The toys all groaned.
Mrs. Potato Head: Oh, Rex, you burst my bubble!
Rex: (confused) Huh?
Rex turned around, knocking down moxxie, Millie, Buzz, Bullseye, Dolly, Hamm and Mr. Pricklepants.
Hamm: Eh, what a buzzkill
Rex: Sorry, I didn't...
Mr. Potato Head: Ha! You're what they call a party pooper! (sing-songy) Party Pooper Rex! Party Pooper Rex!
Toys (minus Rex): (sing-songy) Party Pooper Rex! Party Pooper Rex!
The dinosaur toy felt embarrassed and ashamed until the toys heard something
Bonnie's mom: (v.o) Bonnie! Bath time!
Bonnie stands up excitedly
Bonnie: can I bring some toys?
Bonnie's mom: (v.o) you can only bring one toy
Hearing that, all toys scattered and hid, leaving Rex alone.
Mr. Potato Head: I ain't no bath toy
Rex: oh boy
Bonnie picks him up
Bonnie: don't worry Rex! You'll be perfect for the search party.
It was night time in the arctic when a toy boat with a captain's face on top, known as Cap'n, was sailing through, shining the searchlight from his boat and sees a glowing puffer-fish, which was a distress signal.
Cap'n: Cap'n's log: Received a distress signal, but no sign of...
He gasped as he saw someone floating in the water.
Cap'n: Survivors!
He rushed up to that survivor.
Cap'n: Son, squeak to me!
The survivor was a yellow rubber duck named Chuck E. Duck, who wheezed
Chuck: Save yourself!
Cap'n: (puzzled) What?
Then, without warning, a giant and monstrous Rex bursts from the water, roaring menacingly, with lightning flashing in the background.
Rex swung his tail, hitting the water and sending Cap'n and Chuck flying in different directions
Back in reality, Bonnie was in her bath tub, covered in soap bubbles, while playing with her toys as she screamed.
Bonnie: (as Cap'n) Fire torpedoes!
She imitated guns firing as if Cap'n was firing at the dinosaur.
Bonnie: (as Rex) No! I just want to have tea with you!
Then her mom arrives, seeing the floor is starting to become wet.
Bonnie's Mom: Okay, trouble. There's way too much water in here.
Bonnie realizes that, as her mom turns off the water by pushing the large water-running knob in the wall and pulling the plug from the drain.
Bonnie: Aw!
A robot radio toy named DJ hanging on the wall almost started until Bonnie's mother turned it off.
Bonnie's Mom: You want to flood the house?
The glowing puffer-fish toy was thrown in a strainer with some other toys, making the other toys glow.
Bonnie: Yeah!
Bonnie's Mom: (sets Rex and toy fishing pole on the edge of the tub) Well, how about dinner at Grandma's instead?
She takes her daughter, now covered in a towel/robe with a cat's head on top, out of the room.
Bonnie: Grandma's!
She laughed in excitement.
Bonnie's Mom: (chuckles) Sure.
Rex watched them leave until he heard a bunch of other bath toys cheer. He saw them moving around.
Cap'n: Welcome aboard!
Chuck: Yeah, baby! You were way scarier than the last sea monster! (turns to a water-squirting alligator) No offense, Cuddles.
Cuddles squirted water out of his nose.
Cuddles: No problem.
Cap'n: Ha! What do they call you, sailor?
The captain mades bubbles with his hat pushing down.
Rex: Well, my friends call me...
Then a thought bubble appeared next to him, with the image of Mr. Potato Head calling Rex the same name from before.
Mr. Potato Head: (sing-songy) Party Pooper Rex!
So Rex tried to think of a better name.
Rex: Um...Partysaurus Rex!
Cap'n: (grins) Avast thar!
Chuck: You're in the right place, baby! Because when the water's high, the party's fly.
Cap'n: Aye, aye!
Everyone cheered until the water was all drained out and as that happened, the Bath Toys all collapsed
A little felt female purple octopus toy, who was sitting on the fish hook hanging over the tub's edge with a felt red lobster toy, falls out.
Purple Octopus: Oh! My lobster.
Red Lobster: (holds claw out) Till tomorrow, my love.
Rex: (curiously) And when bath time's done?
The bath toys were all stiff, some lying on their sides.
Chuck: (sadly) There's no more fun.
Cap'n: We need water to move.
They struggle to move around.
Scuba Diver: Bath time's only 15 minutes a day!
A whale-shaped faucet cover named Drips spoke up.
Drips: We can all party all the time if we could turn the water on ourselves.
Cap'n: Aye, Drips. But no one's got arms here, expect for Barbara. (calls up) How we doing, Babs?
The toy he was calling to, known as Babs, was a blue octopus who had her tentacles stuck in a bowl and has been hardly used, as she was on top a high shelf.
Babs: Weeks, months. (struggles to get herself free) Scrubbing's been light, Cap'n.
Chuck: Oh, man! (choking up) I wish we could get this party started up in here. No more tears!
All the toys were miserable and wanted their party to go on. Then, Rex realized something.
Rex: Well, I've got arms. I could get this party started up in here.
Chuck: Without Bonnie?
Cap'n: Topside?
The bath toys murmured in concern as Rex walked over to the cold knob and turned it, and water came pouring out.
Drips: Huh?
The whale spoke in a joyful yet muffled matter. The water began filling up the tub and the drain was plugged.
Cap'n: Shiver me timbers!
Rex turned on DJ, which began playing party music by BT, and the bath toys began floating again.
Chuck: No way! Yeah, Rex! That's it, baby!
The green dinosaur toy carried the female Viking bubble-pumping bottle over.
Rex: Let's pump this party!
He started pumping some soap into the tub.
Chuck: Partysaurus, you rock!
He then chucked the toy boat into the tub. Next, some other bath toys dove into the tub, one by one. Rex laughed in joy with this.
Cap'n: Aye, aye, matey!
Chuck: (grooving) Check me out! Oh, yeah!
Cap'n: A thank ye to Rex!
Rex then saw three necklaces (two multi-colored and one black-and-white) were thrown around his neck, along with a toy octopus on top of Rex's head, looking like a crazy wig.
Rex: Wow!
The bubble bottle tossed the Viking hat and it landed on the octopus wig. This now made Rex the lord of the bath tub.
Rex: Thanks!
Chuck: Rex, baby! How about a little more bubbles!
Rex: (concerned) More? No, no, no, no!
Then the thought bubble with Mr. Potato Head appeared once more.
Mr. Potato Head: (semi-deep voice) Party Pooper!
The thought bubble disappeared, and Rex still didn't want to be as Mr. Potato Head called him.
Rex: I mean...no...PROBLEM!
He used his tail to knock the Viking soap bottle into the tub, resulting in the entire contents to come out.
Chuck: We really got a party up in here!
As the bubbles were growing bigger, the other bath toys in the strainer, looked at Rex, with one glowing Dolphin toy, Dolphina, speaking to Rex.
Dolphina: Partysaurus. Can you get some of us in?
Rex: Are you crazy? There's...
He then heard a certain potato toy's voice in his head again.
Mr. Potato Head's Voice: Pooper!
Rex:...there's enough room for ALL OF YOU!!!
He used his tail again to knocked all of the glowing bath toys into the tub, making them and all other bath toys cheer. The bath tub was now a rave-like fashion, with the lights somehow turning off and the bath toys lighting up. Two different-colored rubber duckies hopped up and down, switching two different-colored lights off and on in rhythm. Then DJ swelled up before all of his lights glowed, making everything glow in different colors. The party had truly begun.
Chuck: Yeah, baby!
Cap'n: All hands on deck!
Cap'n and Chuck pushed the strainer and the glowing toys who used to be in it got under it to light up through the holes a la reflecting disco lights. All of the bath toys danced along wildly, Chuck laughed madly and the lobster twirled the purple octopus.
Purple Octopus: My lobster!
Everyone was having a blast until they heard something.
Cap'n: What's that racket?
It was coming from the overflow drain, where the water was disappearing into.
Chuck: What?
Scuba Diver: (pops up) The overflow drain?
Rex: Huh? No problem!
He grabbed a green frog sponge.
Sponge Frog: Hey, whoa.
Rex threw the sponge frog to the overflow drain, and he ended up blocking it.
Sponge Frog: Whoa, this dude really knows how to party. Seriously...
But the water filling up prevented him from talking clearly further as he gurgled.
Chuck: (stunned) He blocked the drain.
Scuba Diver: We will overflow!
They were all stunned for a silent moment, until the party resumed.
Chuck and Scuba Diver: Awesome!
Chuck: Thanks, Partysaurus!
Rex, not hearing everything, still stood at the edge of the tub.
Rex: Partysaurus doesn't worry about too much soap and the tub will overflow...
Hearing what he said, he stopped in shock.
Rex: Overflow? (turns to the bathroom door) We'll flood the house!
He saw the toys were still jamming out, not caring about the house flooding.
Chuck: We're crossing the scum line!
Rex saw that the water-running knob will stop the overflowing, so he ran to it.
Rex: (yelps frantically) Okay, too much water, everybody.
He turned it like mad, until it suddenly popped off.
Rex: Ahh!
The knob fell into the water, landing on the puffer-fish toy, sinking him.
In the bottom of the tub were a small group of other toys who didn't float (some included Mr. Ray and a Rubix's cube), and they were all having a support group.
Figure: Aw, the floaters have all the fun.
Then the loneliness was broken when the puffer fish and the knob landed on the floor.
Puffer Fish: What up, fishes? What what!
Then the non-floaters all started partying with the puffer-fish changing colors underwater, to the notice of the toys back up above.
Chuck: He turned it up!
Cap'n: Avast!
Rex: No! Too much water!
He tried to pull the plug, but to his alarm, the hook was empty.
Rex: (gasps) Help!
Then a toy police officer in car appeared.
Police Officer: Sir, this party is out of control.
Rex: I know! There's too much...
Police Officer: (excitedly) Out of control!
He dived right in as Rex saw the bubbles growing bigger when the water rose. Screaming madly, he ran up to the faucet and pulled a lever, making the party stop and the regular lights turn back on.
Drips: Aw, man!
The bath toys made disappointed groans as they looked at Rex.
Chuck: Aww! You got to be kidding me.
The dinosaur saw the tub no longer overflowing.
Rex: (sighs in relief) That was close.
Suddenly, a whooshing sound was heard, Rex looked up at the shower head, which was where the sound was coming from, making him realize he pulled the shower lever. Sure enough, an insane pour of water came raining down from the head and sprayed the bath toys' faces. Bubbles flew everywhere and the party resumed once again.
Cap'n: It's a perfect storm!
Bath Toys: Aye, aye!
Then the party went mad! All bath toys danced on top of the strainer, while DJ's music started blasting. Some more bath toys pushed Rex into the tub as he yelped. He got a tutu, glow rings and other party junk thrown on him, and unwillingly crowd surfed on the bath toys.
Rex: What are you doing? My tail! No, not the...Oh!
He was thrown onto the disco strainer. The dinosaur saw that the tub was overflowing, and the water was going over the tub.
Rex: Overflow! Overflow!
The toys still celebrated, not hearing Rex's cries.
Chuck: All hail the Partysaurus Rex!
Rex: (shouts) We're going to overflow!
Then, the whole flood of water began flowing from the tub.
Chuck: (excitedly) We're going over the top, baby!
Rex went over first, screaming. Then DJ shook madly.
Cap'n: Secure the rigging!
Pretty soon, all began joining, with the bubble viking lady holding an opera note in excitement. The only one who remained was the green frog, who kept blocking the overflow drain. Babs jumps in, whooping with joy.
Cap'n: Man overboard!
All the toys poured through the bathroom in an avalanche of themselves, water and suds.
In the house, Buzz, Hamm, Mr. Pricklepants, Jessie, Mr. Potato Head, moxxie and Millie were walking up to the bathroom
Millie: it has been a while hasn't it?
Moxxie: (calls out) Rex! Are you okay in-
Then, without warning, the flood of water explodes out through the door, pushing the other toys, and spread throughout the house.
Later a plumber arrived at Bonnie's house, closing the doors of his truck. He was talking to Bonnie's confused mother, who had to pay for the repairs of the flood.
Inside, the toys were all soaking wet. They used the fan to dry themselves off, with Mr. Potato Head removing his ears, and water pouring out of the ear sockets. Rex came to them, praising his short-lived fame
Moxxie: okay, what was up with last night?! You practically flooded the house!
Rex: sorry but you should've been there! It's was the best party you ever saw! And I was a Partysaurus!
Mr. Potato Head: (in disbelief) Party? You? (chuckles sarcastically) I'll believe it when I see it.
Voice: Psst! I-yah, Partysaurus!
They looked at the window sill and saw a water sprinkler with a face and had nozzles that looked like Jamaican dread-locks.
Jamaican Sprinkler: We hear what ya done for the bath toys. Can you hook us up, mon?
Rex, Woody, and the other toys looked out the window, seeing the inflatable turtle-shaped backyard pool with inflatable toys.
Pool and Inflatable Toys: (chanting) Rex! Rex! Rex!
Even a small squeaky fish toy was bouncing up and down, wanting more water from the hose. Rex saw the faucet that turned on the sprinkler in the pool. So, he put on the Viking hat and octopus wig.
Rex: Duty calls!
He jumped out of the window, shouting and went to the faucet, turning on the sprinkler, with his nozzles spraying out water like mad.
Jamaican Sprinkler: Yah, mon!
The party begun just like back at the bathroom, with all inflatable toys joined together in the pool, and they tossed Rex up in the air as he laughed with joy.