The duo headed towards a large bar-like area called the 'gas chamber'. After they arrive Ben can only looking around unimpressed, "let me guess, The Balloon is a regular size here, right?"

"Actually, this is where the cybernetic bipedal is…the one known as 'Bubble Helmet' by the Plumbers." Rook was about to knocking the door, but stopped when suddenly a squid-like fish creature came out of the door, glaring at them.

"Take the back way, oxygen breathers." The squid-like fish alien hissed in annoyance before slamming the door in front of their face.

"Yeah…you better wait out here, Rook. Wouldn't want you to get-huh?" ben stopped mid-sentence as he saw Rook ignoring him while pulled out his Proto-tool and worn his mask. Ben sighed at his partner disobedience before pulled out his jacket sleeves and revealing his own weapon which is the Ultimatrix.

"Let's go." Rook opened the door, before raised his badge into the air.

"Appendages in the air!" The various fish-like creatures only stared, not intimidated at all, before a green flash appeared. The light died out, revealing a green turtle-like alien, with six holes in his torsos, and big flat flipper-like arms. He also have small stumpy legs, green eyes with no pupils and lines going down his eyes, with the Ultimatrix symbol present on his chest.

"Terraspin!" The turtle-like alien  glares at the folks while walking into the atmosphere with no problem before stopped beside his new partner and whispered "Cool it with the badge, rook. We're not cops…well, you are. I'm a super hero."

Terraspin turned his attention towards the crowd and cleared his throat "OK, we're looking for a guy named Bubble Helmet, you heard of him?" No one spoke or at least bother to responding towards Terraspin question.

"Not chatty, huh? Well…maybe it's just this atmosphere. Allow me to change it up." Terraspin's head suddenly retracted inside his shell, before he spun his limbs in a circle, releasing a suction that retracted the gas. The creatures around him began to cough and hack at the sudden change in atmosphere thanks to the transformed teen.

Rook looked around the crowds and finally saw Bubble helmet, which was actually a large pink worm wearing the armor, gasping for breath as he searching for his helmet. "There he is!"

"I see him!" Terraspin muttered from inside his shell as he directed his spin towards the ground, before flying  over the people, landed beside the helmets and grabbed it away from him. "Hi, remember me?" The turtle-like alien glared at Bubble helmet, before tossed the helmet to Rook, who easily caught it.

"Nice place you got here…great atmosphere. Anyway Listen, we'll leave if you tell us who is in charge of these shake downs, who is your boss?" Terraspin demanded as Bubble Helmet hacked a bit.

"I'll tell-" Bubble Helmet coughed, before continuing "-once I can breath…" Terraspin only send the criminal a distrustful looks while  Rook just nods, before putting the helmet on Bubble helmet head.

"Fair bargain." Rook admitted, as Terraspin facepalmed.

"Rook, what are you doing!" Terraspin looking at Rook action in disbelief while suddenly Bubble Helmet pressed a button with a smirk, before gas formed into his helmet, as he suddenly took off into the air and flew away, leaving the duo behind.

"Rule number one with bad guys, do not let them trick you!" Terraspin solemnly informed as rook sheepishly scratching his neck. Terraspin suddenly began to rotate towards the ground as Rook got on top of his shell and the two went after Bubble Helmet, leaving the atmosphere in the bar returning to normal as they left.

"First time deal with an interrogation, huh Rook?" Terraspin curiously inquired.

"Yes, I have read about them. This is one of the first time I had interacting with them." Rook admitted.

Terraspin sighed from inside his shell
"it's OK. You'll learn eventually and maybe finally getting used to this." Terraspin reassured, while didn't detouring his focus on chasing the runaway criminal.

"We better not lose him." Rook taking off his mask. "this rodent will lead us right to their nest." Terraspin grunted in agreement from inside his shell before accelerating his pace.