What it does
Wave Crash is a high-power Water physical move that deals recoil damage to the user based on the damage inflicted. That sounds like a big downside, but with the right support — recovery from a partner, a Protect turn, or an ability that offsets damage — the recoil is manageable.
The move's value is straightforward: maximum single-turn Water physical damage output. Every primary user has STAB on Water, pushing the effective power well into KO range. You're not bringing this for versatility. You're bringing it to remove a specific target on the turn you need it gone.
In doubles this is a single-target move — no 0.75× spread penalty. Compared to Surf (which hits your own partner) or Waterfall (lower power), Wave Crash delivers the best raw output per hit when your target is clear.
Who runs it
Palafin (90%) is the definitive user. Hero form's base Attack is among the highest available, and Wave Crash turns that attack stat into immediate, massive pressure. The recoil is a real constraint — consecutive turns of Wave Crash drain Palafin's HP fast, so Protect timing and partner recovery matter. In doubles, Palafin typically enters the field after partners clear the way and uses Wave Crash as the closing hit.
Basculegion (76%) has Swift Swim, which doubles its Speed in rain. Under rain, Wave Crash on a fast, powerful physical attacker becomes extremely hard for most non-resistant targets to survive.
Quaquaval (24%) has other coverage options like Close Combat, so Wave Crash here is the Water STAB slot — it keeps Fire, Rock, and Ground types honest and prevents opponents from leaving in resists freely.
How to use it
Rain support: Basculegion's Wave Crash under rain hits at a level that one-shots most non-Steel, non-Grass targets that lack specific Water resistance. Set rain up first with a weather setter before Basculegion enters, and immediately get to work.
Recoil management: Every hit of Wave Crash costs the user a portion of its own HP. Give your Wave Crash user Protect turns — not to stall, but to stop recoil from stacking into self-KO territory. Don't use it three turns in a row without a break unless you're certain the game ends on that third hit.
Pick your targets: Against Water-resistant targets — Grass, Water, Dragon — Wave Crash is a wasted move slot. Save it for Fire, Rock, Ground, and anything you can guarantee a KO on. Using it into a resist while taking recoil is a double loss.
Tips & strategy
Never use it into Water immunity abilities: Water Absorb and Storm Drain turn Wave Crash into healing for the opponent — and you still take recoil. Check the opposing field before clicking it.
Palafin's form timing: Palafin transforms to Hero form when it re-enters the field after using Flip Turn. If your plan is to hit with Wave Crash the turn it arrives, account for the turn that transition happens and make sure Hero form is already active before the KO swing.
Recoil doesn't reverse the damage: If your target is on its last legs and Wave Crash finishes it, the recoil you take is irrelevant — the target is gone. Don't hesitate on the last hit out of fear of recoil. The play is to fire when you can secure the KO, not to protect a sliver of HP on a mon whose job is done.