— Rocky, numerous occasions
Rocky first got his vomit in "Sweet Tooth", and according to Tennis Ball, after he started vomiting, he didn't speak a lot (as his only other line was in "Rescission"). From that point forward, he started communicating by vomiting and saying "BULLEH". He has vomited on various people during Season 1.
However, he lost the ability to vomit in "Return of the Hang Glider", due to Spike Ball Speaker Box breaking the Vomit Generator inside Rocky's Mouth, but he somehow got it back somewhere between "The Long-lost Yoyle City" and "Welcome Back".
To allow Rocky to vomit more acid, he must consume something.
Cake Batter is an item in the BFDI series. It is unknown if it made an appearance in any of the seasons to make cake. It made an appearance in BFB 4 when Beep made their cake of Four but the Cake Batter they were using came from Rocky's vomit. In BFDI 4 Rocky barfed into a bowl with what seems to be water, it seems to either taste good or the judges ranked it high out of simply Rocky's barfing and forgetting how to speak since it was ranked 22/26.
- Rocky's vomit has actually helped in certain challenges, such as the ones on "Sweet Tooth" and "A Leg Up in the Race".
- Rocky's bowl of barf was ranked 22/26 in "Sweet Tooth".
- Tennis Ball and Balloony are possibly the only ones who actually like Rocky's vomit.
- It appears to be made out of the same substance as Barf Bag's barf.
- The first person Rocky vomited on was Ice Cube.