This is a list of outfits and different designs of Yoop.
Rock n' Roll Costume
Yoop wears an unnamed costume when it's time for scoring round. He plays his guitar in the band called "Primal Screech" (which is a parody of "Primal Screen" who produced Plory and Yoop).
Yoop wearing this can be seen in Scoring Round, and some i-Ready lessons outside from Scoring Round. It's also seen in Working with Words.
He said, "It's pattern time!" wearing the costume, in 90's-styled background in the lesson "Find One More - Instruction - Level AA" (which can be seen as an image here).
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News Reporter
Yoop is wearing just a mustache with holding a microphone.
For Plory's version, check out Plory/Forms.
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Cuber Form
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Headband
Yoop with a headband. Seen in Practice Round.
Fruit Hat
Yoop is seen wearing a fruit hat with the Goopers wearing different hats as they're having a "silly hat tea party.”
Chef Yoop
Yoop wearing a chef hat. Sometimes, he wears a mustache and the thing below him (as they're not seen in the image below). Seen in some i-Ready lessons.
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Gooper Hat
Yoop is seen with the goopers covering his head.
Super Yoop
Yoop is seen just wearing a cape. Seen in some i-Ready lessons. It's also seen in Working with Words.
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Pool Party Costume
Yoop is seen wearing a snorkel, and a floaty.
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Classical Yoop
Yoop is seen wearing black hair, with a mustache. His eye is a bit changed and also wears a purple-white shirt. Seen in Working with Words.
Sad Yoop
When something unfortunate happens to Yoop or that makes Yoop sad, this is the face he would make. Seen in some i-Ready lessons.