I see some players saying that Chansey, Slowbro, Rotom-W, etc...happen to be the best SwagPlay checks. Now note that the multiple Leppa Berry complex bans came about due to the "creative dickishness" of players. In this case, Swagger players may soon resort to this:
Whimisicott @ Leftovers
Ability: Prankster
Nature: Bold / Calm
EVs: 252 HP / 252 Def or SpD / 4 SpD or Def (whichever, really)
- Swagger
- Substitute
- Leech Seed
- Taunt
...while leaving their general game plan intact. It can easily put the pressure on those bulky sponges and deny their recovery, sapping their health away without relying on Foul Play, then proceed to Swagger all over the place anyway. It also isn't farfetched for Thundurus-I to run Thunderbolt to fry Slowbro.
While this Whimsicott is technically a pro-ban argument, it is also a classic example on how it doesn't manage to abuse Prankster Swagger to the absurd degree we are all familiar with (and loathe). This is
arguable proof that Prankster Swagger itself is not necessarily the issue to address, but since it still technically leaves the game up to chance, the verdict would still highly subjective.
Prankster confusion by itself is pretty annoying at worst, but there are a good number of moves that can easily take advantage of this to put the confusion users in a somewhat unfair (again, subjective) advantage over the victims, who usually has little to no say in whether or not they want to participate in these games of pure luck. Let's say both players play a game where they may only use moves that can miss (or hell, Metronome battles). It leaves the game up to chance also, but at least
both players signed up for it, which is what makes the element of chance fun. The problem starts when the element of chance is
forced onto other players, like evasion boosting (this is different from lowering the opponent's accuracy, since the opponent can
choose to either switch or stubbornly break through the hax). Players are not saying it is unbeatable (the fact that it has the tendency to work is another story altogether), but
it removes their choices in battle. Now I know not all Prankster Pokemon can make use of Swagger as effectively as some others, but the same can be said about Double Team (the best users have recovery and a degree of bulk). Prankster Swagger will likely have to be banned on the same grounds as Double Team, even if it does hurt Pranksters that are more reliant on just Swagger to succeed with it.