It's a big example of The Power of Love all the way.
It's powered by a public display of affection (with Super Craig and Wonder Tweek holding hands) and plays Let's Fighting Love at the climactic moment in a burst of pink flowers. It has a big radius, and it both confuses and damages all enemies in range, making it perfect for groups of enemies. The shared Ultimate itself is a combination Moment of Heartwarming and Awesome.A later mission has the two making up and gaining a shared Ultimate for the rest of the game. Early on in the game, Super Craig explicitly calls Wonder Tweek his ex-boyfriend and proudly states that he's gay.Tweek bought Craig a pet guinea pig, Stripe the Fourth.Since Word of God confirms that Craig and Tweek have indeed become an Official Couple in the show, it says a lot about how strong their relationship gotten to the point that Tweek is one of the only two things Craig cares about, very possibly beating out even his own family. A moment outside of the game itself: According to some whiteboard development notes for the game, Craig only cares about two things: his guinea pig and Tweek.
