Beast Rizer Pocket

Petropolis Pocket (ペトロポリスポケット) is an action-platform video game by Namco for the Nintendo Game Boy. The first handheld game in the series, it was released in Japan on May 5th, 1996 and localized overseas on May 10th, 1996. The game has the players play as four different characters, each with a different narrative.

Characters and Synopses
As stated earlier, Petropolis Pocket has six playable characters with their own plotlines. The final story focuses on a giant chimeric monster that emerged from the ocean, its presence threatening the beastmen of Petro Islands. While Thunder transforms into his chimera self to calm it down, the other heroes fight the chimeric clones of themselves the monster was able to produce. After they have done their job, the chimera disappears into the ocean and the heroes once again saved the islands.
 * Thunder Storminski: After the defeat of Valentine the Alchemist, the young coyote was suddenly invited to participate in the Island Challenge, where beastmen are chosen to pass several tests and courses in order to be given the Islander's Medal. Aside from Clawface, Fluff and Ryuji joining him, he meets two new contestants: Bill, an egotistic platypus who claims to know everything about the islands, and Victor, a cool-headed snake with a mysterious personality.
 * Julie Vixen: Julie and Elsa find their town suddenly assaulted by crystals, which were derived from Wilhelmina Witch and her no-good Gem Guards. After witnessing the attack, Julie has developed aircrafts so that she and Elsa can go after the witch and destroy all of the crystals
 * Walter McBlowhole: Walter's self-managed business is in danger of being absorbed by a corrupt entrepreneur named Renfield, who plans on using his company name for a suspicious-looking amusement park he is building in the center of the Southern Islands. With the help of Grace, he is sent to investigate the amusement park and put an end to Renfield's schemes.
 * Bolt Cinnastar: Bolt goes with his adoptive father Sheldon to the Vanilla Isles for a vacation trip, but then Bolt is suddenly attacked by an army of dinosaurs who want to claim the lands for themselves once again. Teaming up with a bull beastman named Angus, Bolt must defeat the War Zard General and his boastful son Daichi.