Mac brings his class over to Foster's for a field trip, and Bloo as usual tries to be his showboating self to get all the attention, but it's Coco who the kids go gaga over. After getting in a fight with her over this, Coco makes a series of collectors cards of every imaginary friend in Fosters, and Bloo claims he can collect them all by himself without apologizing or needing help from Coco.

Tropes:

• Bannister Slide: Eduardo does this (very slowly) to try to upgrade his status on his card and prove that he's not a chicken.
• Chekhov's Gun: Bloo intially wanted his own collectors card out of vanity, but upon realizing it was ridiculously common (therefore making it worthless), he discarded it. When Coco tells him he's still one card away from a complete collection, Mac helps him realize that he's missing his own card.
• Comically Missing the Point: Bloo frantically tries to figure out which card he's missing from his collection. After giving a quick look through his collection, Mac says Bloo. Bloo thinks Mac is just calling his name, so Mac instead brings him in front of a mirror. After vainly posing in front of it and admiring his reflection for a few seconds, he finally realizes that the card he's missing is his own.
  Bloo: ...It's me. I don't have a Bloo card!
  Mac: Bingo.
  Bloo: No, I have him.
• Commonplace Rare: Bloo's own collector card starts out the most common card out of all of them, to the point the others can afford to use them as drink coasters and for other things, so Bloo initially tosses the first one he gets aside to focus on the rest of the card. Once he collects all the other cards, he realizes he forgot to keep a copy of his own card and needs one to complete his collection, but suddenly has trouble finding a single Bloo card anywhere.
• Envy-Based Mimicry: Bloo gets jealous when Mac’s class comes to Foster’s on a field trip and they all like Coco more than him. After Coco amazes the kids by laying colorful plastic eggs with trading cards inside, Bloo tries to steal the spotlight by getting some regular eggs, which he then throws at the kids, scaring them away.
• Getting Crap Past the Radar: Bloo’s bulged-cheek expression on his card is a reference to the fact that many old-school ballplayers loved to chew tobacco on the pitch.
• Gilligan Cut: Mac sarcastically asks Bloo if he plans to whine until everyone gives him cards, which Bloo denies. Only we cut to Bloo doing just that in the next scene.
• Guilt-Tripping: How Bloo initially gets the other friends to give him cards. Later he begins to barter services for them.
• Here We Go Again!: After apologizing to Coco, she gives him a Bloo bobblehead. However, Bloo discovers that Coco's made various other bobbleheads as well (and his bobblehead is also the most common one as well), starting up another collection craze.
• Jerkass Realization: After Bloo finally finishes his collection with a Bloo card, he takes the time to read the description and sees that ALL of his stats are negative, centered around him being mean and hating Coco, leading up to his personality which simply reads "Big insensitive jerkface". Finally realizing that he hurt Coco's feelings with all of his antics, Bloo finally apologizes to her, and to prove he's being sincere, throws his entire collection of cards into the fireplace.
• Nobody Calls Me "Chicken"!: Eduardo isn't happy with his cards initial description of "Big fat baby", and tries to prove he's braver to improve his standings. After pulling various stunts, he goes through "Chicken", to "Scaredy Cat", and then finally "Crazy idiot".
• Not Helping Your Case: Bloo tries to get Wilt to trade his last cards for a Bloo card by signing it. When Wilt says that makes it worth even less. Bloo tears it in half which makes it completely worthless.
• "Oh, Crap!" Smile: Coco gives one at the end of the episode when Bloo finds out she's made various bobbleheads of everyone at Fosters, and the Bloo bobblehead is the most common (aka the most worthless), starting his collection craze all over again.
• Ordered Apology: Coco demands an apology from Bloo for stealing the attention from her and scaring off her new friends from Mac's class. She gives him a pen, an apology card, and a self-addressed envelope. However, Bloo refuses to apologize to her since he believes that she's purposely hindering his card-collecting quest, and tries to collect all the Coco Cards without her help.
• Overly Long Gag: Bloo whining for cards.
• Shout-Out: This episode's title is a reference to "Cuckoo For Cocoa Puffs", the slogan for Cocoa Puffs cereal.
• The Unapologetic: Bloo refuses to apologize to Coco and tries to collect all the Coco Cards without her help. He finally does apologize when he sees the status on his card: "Big insensitive jerkface".