Pretty much this
>>19332991Though I don't hate them. I have a tendency to like psychic types and I think they're somewhat interesting (I haven't played enough of Sinnoh to actually see them in-game, so there's still that mystery part).
But I fully understand why people don't like them. They are very similar in deisgn, colors and typing (although this could be a good thing, once all things are considered it's not worth much overall).
Really, the one thing that makes me want to catch and train them up is that their stats are different, so they wouldn't fill the same roll.