Grumpig holds the title of the best psychic type in BDSP PU. It has the option of going Nasty Plot and a bulky spdef wall set. Thick Fat adds to the limited resistances of the psychic type, letting it handle Ninetales, Glaceon and other special attackers like Victreebel thanks to its good spdef stat. It might be weaker than Kadabra but Grumpig can run more sets and isn't walled by Probopass.