Psychic Soft Check
Gardevoir @ Gardevoirite
Ability: Trace
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Hyper Voice
- Focus Blast
- Psyshock
- Will-O-Wisp / Substitute
Gardevoir's Trace copies the Intimidate ability, cutting Gyarado's attack and allowing Gardevoir-Mega to always live a Crunch after a Dragon Dance. This checks two of the most common moves to set up against Psychic, Substitute and Dragon Dance:
252 Atk Mold Breaker Mega Gyarados Crunch vs. 0 HP / 4 Def Mega Gardevoir: 211-249 (76.1 - 89.8%) -- guaranteed 2HKO
252+ Atk Mold Breaker Mega Gyarados Crunch vs. 0 HP / 4 Def Mega Gardevoir: 231-273 (83.3 - 98.5%) -- guaranteed 2HKO
252 SpA Pixilate Mega Gardevoir Hyper Voice vs. 0 HP / 0 SpD Mega Gyarados: 366-432 (110.5 - 130.5%) -- guaranteed OHKO
If the opposing Mega Gyarados chooses not to mega evolve, Dragon Dance on the switch in, and then Dragon Dance again (to reach +1 attack and +2 speed), it will take heavy damage from Hyper Voice and can be finished off by a Rocky Helmet Slowbro.
252 SpA Pixilate Mega Gardevoir Hyper Voice vs. 0 HP / 0 SpD Gyarados: 229-270 (69.1 - 81.5%) -- 50% chance to OHKO after Stealth Rock
Rocky Helmet: (69.1% + 33.3% > 100% => KO)
+1 252 Atk Mold Breaker Mega Gyarados Crunch vs. 248 HP / 252+ Def Slowbro: 302-356 (76.8 - 90.5%) -- guaranteed 2HKO
Unfortunately, Gardevoir-Mega dies to 2 -1 Crunches from Mega Gyarados, but this lower's the attack enough that other team members can help check the threat. In the end, psychic doesn't have great options for dealing with this threat, but Gardevoir-Mega is one of the best switch ins to Gyarados to prevent a sweep.