>>35206145Game Freak had no idea as to what they were doing. Take Silvally for example: a hyped up Pokemon that was supposed to be a very powerful Pokemon ended up having the majority of its forms in unranked PU. Why? RKS System was a poorly executed with the "memories" being flawed.
Dishonorable mentions:
>guzzlord (very slow)>vikavolt (also slow (>42))>midday and midnight form lycanroc (midnight got the worst of it with a shit stats spread and movepool, with no headsmash despite the pokedex implying that it does lol) 