Wigglytuff @ Fairy Feather
Ability: Competitive
Tera Type: Fairy
EVs: 4 Def / 252 SpA / 252 SpD
Modest Nature
IVs: 0 Atk
- Nasty Plot
- Draining Kiss
- Alluring Voice / Dazzling Gleam
- Fake Tears / Light Screen
Wigglytuff of all mons will be phenomenal here. Immune to both of Dragapult's STABs pre-Tera, and will take little from its other moves. Worst case scenario would be a +SpA Hydro Pump or Fire Blast, and even then it doesn't do a lot and can miss:
0+ SpA Tera Dragon Dragapult Hydro Pump vs. 0 HP / 252 SpD Wigglytuff: 103-122 (24.4 - 28.9%) -- 99.7% chance to 4HKO
It has Nasty Plot to quickly boost its SpA, along with STAB Draining Kiss for healing. Alluring Voice in the event Dragapult boosts in front of you so you can confuse it, but Dazzling Gleam has the same base power and doesn't require DLC. To run Fake Tears or Light Screen depends on whether Dragapult has Clear Body or not.