>>45983866Strong pokemon with defined weaknesses, and MAYBE one all-rounder.
Obvious coverage for the things that traditionally beat them. Earthquake Gyarados is the classic example.
A defensive check to both physical and special attackers.
Give them something that locks down the boxart legendary
Bulky attackers in general, that most pokemon will 3HKO at best
Status that Full Restore won't fix.\
Adhere to a theme, not necessarily a type. Iris is the go-to for this, she's "Dragons", but includes things like Lapras and Aggron. Steven is Steel, but he's also all about cool rocks, thus, the fossils.
AVOID Pokemon that are good in competitive, while not giving them the movesets or abilities that make them competitive, or slow, frail attackers.