What combination of moves, abilities, items, etc have the highest chance of rendering the foe immovable?

Legit or not legit, doesn’t matter. Though cnsidering paraflinch togekiss has a 90% chance of stopping the opponent, I doubt anything unlegit would be needed.

Pleaselog inorregisterto add a comment.

For the greatest probability that’s strictly less than 100% (Fake Out/holding your opponent up in Sky Drop), using a double battle with significant cooperation between the players…

Suppose your opponent has a Hustle Togekiss holding Ring Target. You have a Cute Charm Skitty which Togekiss hits into to get itself attracted, and you hit Togekiss back with six Mud-Slaps from Skitty (this is why Iron Ball/Ring Target is needed) and a Nuzzle from one of its teammates. Togekiss’s teammates include an Audino with Role Play and Entrainment, which it can use to copy Sand Veil from one of Skitty’s teammates and pass that ability onto Skitty–as well as to another Skitty teammate after a switch, this time a Drowzee. Audino then gets itself KO’d from Skitty’s and Drowzee’s moves.

Eventually Togekiss’s team gets down to 2 Pokemon, and on some turn, all of the following have to happen: Togekiss uses some move, its teammate sets Sandstorm, Skitty KOs the teammate, then Drowzee hits Togekiss with Confusion (Drowzee must be slow enough that this happens after Togekiss’s turn, despite the paralysis) and picks up the move’s eponymous side effect.

On the next turn, Togekiss attempts to use Focus Punch, and both Skitty and Drowzee attempt to use Assist. Both of them are holding Wide Lens, and their team’s moves are carefully chosen to be the two copies of Assist, 21 damaging moves that all have 100% accuracy, and a single copy of Hyper Beam on something in the back. Because all of Togekiss’s teammates have fainted, both Assists will be assured of aiming in its direction, instead of being diverted onto a teammate.

In order for Togekiss to successfully hit its move this turn,allof the following have to happen:

After factoring in all the other steps, the final odds of Togekiss failing to hit its move for some reason or another are 99.9999985457%, leaving less than a 1 in 68 million chance of success. Which is still more than 4 times as likely as winning the Powerball jackpot on any given ticket.

Fake out + Scrappy. 100% flinch.

Trick room Jirachi using skill swap on a Melmetal with double iron bash yields 2 *60 Flinch chance.