Omastar

Omastar finds its place on most teams as a deadly late-game cleaner thanks to its great base 115 Special Attack and access to Shell Smash, one of the best boosting moves in the game. Its solid base 75 / 125 physical bulk combined with its Rock / Water typing gives it a decent number of setup opportunities against Pokemon such as Fletchinder, Drapion, and Choice-locked Emboar. Sadly, its below-average special bulk and low Speed prior to using Shell Smash mean it can get KOed by decently strong special attacks before it manages to get a boost up. Its typing also gives it uncomfortable weaknesses to Fighting- and Electric-type moves on top of a 4x weakness to Grass-type ones. This is further worsened by the presence of Pokemon such as Venusaur and Virizion, which are bulky enough to tank an unboosted Ice Beam from Omastar and can OHKO it with their Grass-type STAB moves. Omastar's access to both Stealth Rock and Spikes makes it a decent suicide lead, although it struggles heavily against Blastoise, the tier's most popular spinner.