Smash characters who commited war crimes:
(worked as a mercenary and commited Pikmin genocide)
(illegal doctor who killed soldiers to steal their organs)
(cursed the Great Deku Tree and Lord Jabu Jabu, attempted starvation of Gorons, imprisoned several Sages, cursed holy temples, froze Zora's Domain, performed a coup and assassinated the King of Hyrule, stole the Triforce, commited Hylian genocide)
(known to have been charged for war crimes in the past but specific crimes unknown)
(slave work)
(started a war in the name of a religious cult)
(literally commited every possible war crime, from using nuclear bombs to child soldiers and incest, too much to list)
(mercenary work, Metroid genocide, planet-busting, said the word "****")
(espionage)
(commited Toad genocide)
(mercenary work, is a furry)