Diddy Kong is a character who appears in Mario and Luigi's Stupid and Dumb Adventures.
When Bowser is choking Black Yoshi he saved him by beating Him up and Implied to Kill him He also appeared as the guard of the time machine. He tries to attack Mario, but attacks Yoshi instead, allowing Mario to go back in time. He also appears in Bowser Jr's Playtime Problem, where Donkey Kong is revealed to be his father Bowser later reveals Diddy Kong is working for him.
Assault: He attacks people most of the time
Murder: He killed Yoshi