King Boo

From Userpedia

King Boo is Master Lucario's previous form. He was known for swearing alot, and was very perverted. The timeline in which he existed was erased, meaning he never existed, and Master Lucario existed instead. Due to this, no one remembers King Boo; not even Master Lucario himself. His two only comic appearance were in Wiki's End and Kakumei. In Kakumei, Wayoshi promoted him to Sysop of Mariopedia, to replace Black Hole Sun, since he had retired. He appeared in this form because he lacked proper sprites at the time. Kakumei takes place in an alternate timeline, which means it is non-canon, and King Boo still exists in that timeline.

Trivia

• Obviously, the timeline in which he existed wasn't really erased, and people do remember him. However, as Master Lucario has a different personality than King Boo, this causes him to view King Boo as a different person than him. But since King Boo's only comic appearance was non-canon, he created the idea of King Boo not existing in the real timeline.