Sceptile @ Sceptilite
Ability: Overgrow
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Dragon Pulse
- Giga Drain
- Focus Blast
- Substitute
Threat: Mega Sceptile
Mega sceptile is easily able to outspeed both starmie and mega charizard x and able to OHKO them with giga drain and dragon pulse respectively. Assuming mega charizard x isn't boosted that is. It can't really switch in on either of them aside from an eq from zard x or a hydro / spin from starmie. Being able to offensively pressure them with its STAB attacks and can go for sub predicting a switch, making it a bit more scary overall.
252 SpA Mega Sceptile Giga Drain vs. 0 HP / 4 SpD Starmie: 306-360 (118.1 - 138.9%) -- guaranteed OHKO
252 SpA Mega Sceptile Dragon Pulse vs. 0 HP / 0 SpD Mega Charizard X: 344-408 (115.8 - 137.3%) -- guaranteed OHKO
Breloom @ Life Orb
Ability: Technician
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Spore
- Bullet Seed
- Mach Punch
- Swords Dance
Partner: Breloom
Starmie is bothered by fat pink blobs like chansey which breloom can easily break past against. Along with some bulky waters if starmie lacks thunderbolt and opts for psychic. Mega charizard appreciates this too as bulky waters like slowbro, quagsire, alomomola could spread status via toxic and just stall it out somewhat. While quag could just curse alongside it without worrying too much. But yea this performs a basic but effectie fire water grass core ;p