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Petropolis 2 (ペトロポリス2) is a platforming video game developed and published by Namco. The second entry in the Petropolis franchise, it was released in Japan on October 1st, 1996, and later ported overseas the next month. It is only available for the PlayStation.

Story
Two years after the events of the first Petropolis (and during the Extra Mode story of the PlayStation remake), a cruel man known only as Dr. Shinichiro, who was reported missing since before the chimera attack, reappeared above the reformed Petro Islands. Controlling what appears to be an enormous UFO, he has sent Zero One, a powerful alien robot built to mimic the appearance of other beastmen, to attack the islands. With Thunder on his personal adventure, Julie and the rest now must rely on three new characters: Milton the red panda, Elsa the eagle, and Harley the hamster.

Characters
Milton Redder: A red panda beastman who is a personal fan of Thunder's. Most of the time he remains inside of his room playing video games, but the appearance of Dr. Shinichiro and the invasion of Zero One forced him to escape from his comfort zone. Without Thunder around, Milton feels it is up to him to save the newly-formed Petro Islands. Milton has a strange ability that transforms him into a different species, and he can choose up to three of them.

Elsa Bluewing: A female eagle who is an expert biker and Julie's pen pal. She was told from her friend about Dr. Shinichiro's UFO floating above the islands and prepared herself to investigate, but Zero One intercepted and almost attacked her until Milton arrived. She decided to team up with him, believing that she cannot defeat the doctor alone. Elsa carries a gun similar to Julie's, but hers fires up to five bullets per shot.

Harley Hamilton: A hamster who acts as Fluff's caretaker. Like his pupil, he is also a master thief, but he steals unusable fragments in order to create vehicles for himself. After witnessing Zero One and Dr Shinichiro's latest assault, Harley quickly stole some fragments to create battle armor to fight their forces. When he first saw Milton and Elsa fighting Zero One, Harley stepped in to assist them and eventually joined their team. Harley can either enter or exit his battle armor, but the mech is where he is at his strongest.

Polaris: An ancient polar bear beastman who originally hailed from an extinct tribe in the Northern Glaciers. Long ago when his village was in peril by a dragon assault, he sealed himself inside an ice cave to prevent himself from being killed. Unfortunately he became frozen after sealing himself for too long, only for him to be freed by a girl named Sable. The first thing Polaris noticed besides the disappearance of his tribe is the incoming Zero One about to attack Sable. After saving her, Polaris decided to defeat Dr. Shinichiro while also learning more about his past.

Esmeralda P. Lynx: A lynx woman with psychic abilities. When he was told about her incredible ESP powers and her ability to predict events, Dr. Shinichiro offered her his request to work for him. Esmeralda was the first boss sent to defeat Milton and Elsa, but the two were able to overwhelm her otherwise powerful psychic powers.

Goddard Hound: A proud canine beastman who acts as one of the guards for Madam Maria. He actually fought against Zero One, but was weakened against him and brainwashed by Dr. Shinichiro to follow only his orders. Goddard is the second boss of the game, being sent to the Northeastern Islands to fight against Harley, but thanks to his battle armor, the hamster prevailed against the hound.

Rourke Warthog: A brutish warthog who works as a dangerous mercenary. Althought he considers himself as a professional who takes his job seriously, he does have a naive personality from time to time, not knowing when someone makes fun of him. He has been hired by Dr. Shinichiro to act as his guard while he works on his secret project. Rourke is the third boss of the game, targeted at Milton himself, but Milton managed to defeat him.

Chief Parrot: The chief of a tribe of parrots from the Southwestern Islands. He proves to be superior and anyone who stands in his way will be executed. However, he chose to join Dr. Shinichiro after Zero One threatened to harm his niece Chloe if he refused the offer. Chief is the fourth boss of the game, and his target is Polaris, who managed to defeat him without any difficulty.

Lyra Cheetah: A female cheetah assassin who seductive and takes the role of femme fatale in a deadly way. She is known for luring her opponents in poisonous traps and taking their lives on the spot. She was also hired by Dr. Shinichiro to assist in the attack of the islands. Lyra is the fifth boss of the game, where she fights Milton, Elsa, and Harley in the Eastern Islands, but instead of being defeated, she was reported back to the UFO.

Miner Mole: An immature mole who is known for "digging first and asking questions later". He is described as being strange yet competent. He was given a task by Dr. Shinichiro to set bombs underneath the Southeastern Islands. Miner is the sixth boss of the game, and he is confronted by Polaris and Harley, who were quick enough to set off the bombs before they detonate.

Flip Frog: A tree frog who works as a mercenary. He normally does dance-like movements when he talks, and is known for showing off and has a complete disrespect for others, even to those of higher authority. Despite this, Dr. Shinichiro ordered him to finish off the heroes for foiling his plans so far. Flip is the seventh boss of the game, and he fights all of the playable characters, but was overwhelmed by them.

Dr. Shinichiro: The primary antagonist. A white goat beastman who is very well known in the criminal world. He has disappeared for 16 years, but he returned while riding a giant UFO that overshadows the Petro Islands. During his disappearance, he has obtained access to alien technology, using it to build Zero One and having him assist the doctor in his latest scheme: transform the islands into a giant geo-weapon. He is cold-blooded and will not hesitate when it comes to annihilation. He acts as the penultimate boss as he faces the other heroes in his UFO.

Zero One: The true main antagonist: Zero One is an alien robot with the ability to change his form to match other beastmen. He was created by Dr. Shinichiro using the alien technology he was able to require for himself. At that point he has followed every order the doctor has given them and asissted him in his project to turn the islands into geo-weapons. In the climax of the game, Zero One apparently gained a conscious of his own and continue to act obedient to Dr. Shinichiro until his loss against the heroes. He is the final boss of the game and has two different phases. The 1st phase is him fighting in his normal body, occasionally switching into other beastman forms. The 2nd phase has him absorbing Dr. Shinichiro's henchmen, transforming him into a horrifying creature worse than the chimeras. As he is defeated, the heroes escape the descending UFO as it crashes into the Northern Glaciers.