No matter what, their episodes always seem to suck. The writers just can't seem to make a good episode centered on them. Who are some of them? This thread is about characters from ANY show, not just MLP
The only example I can think is MLP related unfortunately. Discord. It's probably mostly because I don't consider him "reformed." Just me though.
That's... actually a good question. He's caused more trouble than actually done anything that could be consider "good" to me. 1. Helped Tirek in Season 4 finale 2. Faked being sick 3. Abandoned The Smooze (I say this and yet I can't even determine if The Smooze is good or not either but what happened at the Gala was ENTIRELY Discord's fault) In summary, from what I've seen, he's only caused more trouble.
Every single character from Twilight comes to mind. They're just. So. Boring. Yet another thing making Twilight insufferable. Was gonna say that.
Spike, naturally. Poor guy just can't keep up with the mane six in the character development department. If the writers could just stray away from the Spike going out of his way to appease somepony formula....