Jolteon @ Air Balloon
Ability: Volt Absorb
Tera Type: Fairy
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Thunderbolt
- Calm Mind
- Shadow Ball
- Tera Blast
There are probably going to be a lot of Tera Fairy strats in the upcoming week, but I think, of all potential mons, Jolteon can pull this off the best.
Firstly, let's go over how Jolteon lures Bax, just to get it out of the way.
How it lures Baxcalibur:
Jolteon is a pokemon that has infamously had poor coverage. Thunderbolt, Shadow Ball and Hyper Voice were all the only real ways this pokemon could deal damage. And, whilst this has gotten it quite far, it just frankly is not enough. In Gen 9, Jolteon is a great Terastalisation candidate, serving as a mini-Natdex-regieleki in the lower tiers, with Tera Blast Ice giving it BoltBeam coverage. This is by far the most common Jolteon set, and probably will be what Bax is expecting. Now, a specs Jolteon Tera Ice Tera Blast is admittedly going to put a dent into Baxcalibur, as shown below.
252 SpA Choice Specs Tera Ice Jolteon Tera Blast vs. 0 HP / 4 SpD Baxcalibur: 196-232 (52.8 - 62.5%) -- guaranteed 2HKO
Baxcalibur cannot switch into this attack. This is the part of the purpose of the Air Balloon. We're taking advantage of the fact that Jolteon is a lure primarily to lower Baxcalibur's sense of security. Once they see the Air Balloon, they know that this is not a specs Jolteon. They'd probably assume it was some low ladder "Ooh look no weakness on my electric type" set. Either way, Bax sees that it can come in safely. After all, it gets 3HKO'd by Jolteon's strongest move. Or so it would think.
The strat:
It's not really rocket science; what's going on here. Baxcalibur swaps in on Jolteon as it uses Calm Mind, and Jolteon terastalises and OHKOs with Tera Blast Fairy.
+1 252 SpA Tera Fairy Jolteon Tera Blast vs. 0 HP / 4 SpD Baxcalibur: 392-464 (105.6 - 125%) -- guaranteed OHKO
There are a couple other things, however, that I would like to highlight before I rest my case.
Extras:
The reasonable reaction of the Baxcalibur player will be to Glaive Rush the Jolteon, since the Air Balloon annoyingly stops Earthquake, but Glaive Rush OHKOs anyway.
252 Atk Baxcalibur Glaive Rush vs. 0 HP / 0 Def Jolteon: 322-379 (118.8 - 139.8%) -- guaranteed OHKO
A smart Jolteon player would take advantage of this fact, along with the fact that them pressing Icicle Crash is incredibly unlikely given that Jolteon is setting up (Plus they might still be expecting Tera Ice). Jolteon is guaranteed to survive this hit anyway, just barely. Air Balloon stops hazard damage apart from Stealth Rock to help with this roll.
252 Atk Baxcalibur Icicle Crash vs. 0 HP / 0 Def Jolteon: 229-270 (84.5 - 99.6%) -- guaranteed 2HKO
So since the Baxcalibur is pressing Glaive Rush, and you're going to Tera Fairy anyway, why not Calm Mind again? Get to +2 for free. This may seem like a mediocre benefit, but now lets take a look how Tera Fairy Jolteon performs against the rest of OU.
For starters, it outspeeds every pokemon in the tier except Dragapult, who cannot KO a +2 spdef Jolteon with its specs set. Only with the band set.
252 SpA Choice Specs Dragapult Shadow Ball vs. +2 0 HP / 4 SpD Tera Fairy Jolteon: 85-102 (31.3 - 37.6%) -- 85.5% chance to 3HKO
252 Atk Choice Band Tera Ghost Dragapult Tera Blast vs. 0 HP / 0 Def Tera Fairy Jolteon: 374-440 (138 - 162.3%) -- guaranteed OHKO
Jolteon obviously KOs in return.
Fun fact: Electric, Ghost and Fairy is perfect unresisted coverage against everything in the game. Now I'm going to leave some extra calcs to hopefully sell the fact that this pokemon isn't just good vs the rest of the game, but can outright shred most non-scarfers.
Calcs:
+2 252 SpA Tera Fairy Jolteon Tera Blast vs. 0 HP / 252 SpD Assault Vest Great Tusk: 356-422 (95.9 - 113.7%) -- 81.3% chance to OHKO
+2 252 SpA Tera Fairy Jolteon Shadow Ball vs. 252 HP / 4 SpD Gholdengo: 334-394 (88.3 - 104.2%) -- 31.3% chance to OHKO
+2 252 SpA Tera Fairy Jolteon Thunderbolt vs. 112 HP / 0 SpD Kingambit: 300-354 (81.3 - 95.9%) -- guaranteed 2HKO
+2 252 SpA Tera Fairy Jolteon Tera Blast vs. 0 HP / 4 SpD Walking Wake: 542-638 (159.8 - 188.2%) -- guaranteed OHKO
+2 252 SpA Tera Fairy Jolteon Tera Blast vs. 0 HP / 0 SpD Multiscale Dragonite: 232-274 (71.8 - 84.8%) -- guaranteed 2HKO
+2 252 SpA Tera Fairy Jolteon Tera Blast vs. 252 HP / 252+ SpD Vessel of Ruin Ting-Lu: 290-344 (56.4 - 66.9%) -- guaranteed 2HKO after Leftovers recovery
So with some hazard support, and maybe some chip-damage in the early game, Jolteon can be a surprisingly dangerous cleaner with this set.