If that was in response to my comment, he may have employed dark tactics but he was less of a Knight of Cerberus (a.k.a. less dark) than Chrysalis and Sombra. But he was also a fun guy to have around, he'd be quite likeable if he wasn't evil. And now that he isn't evil anymore, we can look forward to seeing more of him. And maybe Pinkie will have him bring back chocolate rain
Chrysalis and Sombra seem too dark to turn good, they're Knights of Cerberus (really dark villains appearing in shows that usually have lighter storylines). Sombra's dead, Chrysalis might be but we're not sure and she could return. The only Knights of Cerberus I've seen turn good are Shadow (who only got that status by his first appearance and tragic backstory making his games darker rather than his actions themselves) and Beelzemon (who again had a tragic backstory and only became that evil by extreme hunger and addiction for power). Shadow Queen, Dimentio, Black Doom, Mephiles, Hunter J, Cyrus, Beckett, Ghirahim, D-Reaper, Horned King, Maleficent, Monkey Fist, Myotismon, Sykes, Tirek, Yami Marik, all dead.