>>29070083His absolute refusal to do any Level Grinding has led to his party being vastly underpowered, and causing him to eventually get wiped down to only a single pokemon. Twice. In the later games, this is caused by his refusal to use the Exp. Share item because he feels it makes grinding too easy, but then lacks the patience to spend extra time grinding Pokemon individually, making some wonder if he prefers the drama of a failed run.
In his Alpha Sapphire nuzlocke, he didn't realize that Retailate is a Normal-type move instead of a Fighting-type move until it was too late, even when the game afforded him plenty of opportunities to do so.