
Jirachi @ Choice Scarf
Ability: Serene Grace
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Iron Head
- U-turn
- Fire Punch / Ice Punch
- Healing Wish
Posting another teammate because the discussion is pretty dead at the moment. Jirachi works pretty similar as Rotom-H because it provides momentum Gyarados + Toxicroak need. Jirachi is able to check threats such as Gardevoir, Kyurem-B, Diancie and Terrakion with Iron Head and pivot out with U-Turn to gain momentum. Fire Punch to hit Mega Scizor (Skamory isn't hurt by Fire Punch) but Ice Punch is also great to get damage against Tankchomp and Landorus-T. Healing Wish is great to give Toxicroak and Gyarados a second opportunity to sweep if they get weakened or statussed early in the match.
Again EQ -> Taunt on Gyarados because you still won't break electric types 1v1 and they will still be threatening without a good pivot against these electric types. Without Taunt Mega Sableye and Skarmory just wall this core too easily. Your matchup against offense will still be pretty nice with Gyarados + Strong Priority bar fast electric types and Lando-T so already having a way to deal with stall is pretty nice.