Roger

Pre-Tekken 2
Kazuya Mishima took over the Mishima Zaibatsu from his fatherHeihachi. The Zaibatsu became more corrupt than ever under Kazuya's leadership and engaged in many illegal activities such as assassination, extortion, drug dealing and the smuggling of species. Kazuya also recruited Doctor Bosconovitch to work for him. One of the projects he was commanded to work on was creating genetically engineered creatures. Through Boskonovitch, modified animals were created with DNA samples. Roger was created from Kangaroo DNA, whereas Alex was created using DNA from Dromaeosaurid fossil samples.

Tekken 2
Kazuya thought that Roger and Alex were worthless creations and wanted to kill them. However, Roger and Alex managed to escape. They then met Armor King, who taught them how to wrestle. Both Alex and Roger enter to fight in the second Iron Fist Tournament.

Jun Kazama, a member of the wildlife protection organization WWWC, infiltrates the second Iron Fist Tournament to arrest Kazuya, who is smuggling and experimenting on endangered species. She found Roger and Alex and quickly arranged for them to live out their lives in Australia, where they would be safe.

Tekken 5
Prologue: 20 years later, Roger was kidnapped and taken away.Roger Jr. and his mother joined The King of Iron Fist Tournament 5 to find Roger.

Ending Description: After a long struggle, they find him. But they soon discover that Roger was living the easy life, unconcerned about his family and/or fatherly responsibilities. Roger Jr. became shocked and angered at the sight of seeing his dad relaxing while Roger Jr. and his mother were worried sick about him and vengefully uppercuts him through the roof.

Tekken 6
Prologue: After the tournament, life became hard for Roger Jr. and his mother. Shortly thereafter, The King of Iron Fist Tournament 6 was announced, and Roger Jr. and his mother decided to join the tournament in search of victory and financial security Ending Description: Roger is teaching Roger Jr. boxing moves and bonding with his son, when all of a sudden, his wife comes in and confronts Roger with a picture of him with other female kangaroos. As a result, she uppercuts him up through the roof. The screen ends with Roger Jr. gazing in confusion at what had just happened. Throughout the whole ending, canned laughter can be heard.