Sharpedo

Mega Sharpedo is a great late-game cleaner, utilizing both its pre-Mega ability in Speed Boost and its post-Mega ability in Strong Jaw to sweep. Its great Attack and Speed stats allow Mega Sharpedo to hit very hard and very fast at the same time, with Crunch severely damaging Pokemon such as Scizor and Mamoswine. Strong Jaw also boosts the Base Power of coverage moves like Ice Fang and Psychic Fangs, allowing Mega Sharpedo to hit would-be checks and counters, such as Mega Altaria, Heracross, and Hydreigon, very hard. Mega Sharpedo has terrible bulk and a defensive typing that gives it numerous weaknesses to common types like Fighting, Grass, and Bug, although it does resist a very important priority move in Bullet Punch. Said poor bulk means that if Mega Sharpedo doesn't OHKO what's in front of it, it will likely get OHKOed in return. It also faces great competition from other Mega Evolutions like Mega Aerodactyl and Mega Altaria, both of which also have greater defensive utility and wider movepools. Finally, Mega Sharpedo struggles to break through bulky walls like Mega Aggron and Swampert without them being significantly weakened beforehand, which can stop a late-game sweep in its tracks. It also struggles to sweep without entry hazard support.