Kabutops

Kabutops got the short end of the stick in Pokemon GO compared to its marine fossil brother, Omastar, as Kabutops has slightly lower overall stats which severely hampers its performance. It has a superior Attack stat, but it's also hindered in terms of Moveset due to its lack of a Rock Type Fast Move. On top of that, it also was given a bad Water Type Charged Move, meaning its utility is down the drain on both sides of the spectrum. Overall, Kabutops just didn't have much luck.

Best PvE Offensive Moveset

• Waterfall should obviously be paired with Water Pulse, though it also pairs well with Stone Edge and Ancient Power for countering fire-types, which is where Kabutops shines brightest

• Fury Cutter, though legacy, is a good fast move due to its superior energy gain.

• Mud Shot is easier to dodge with and better complements Rock-type coverage when contrasted with Rock Smash.

• Ancient Power is best against targets double weak to Rock, while Stone Edge is better against most other targets

Best PvE Defensive Moveset

• Waterfall and Rock Smash are both worth considering, though Waterfall does have the slight edge in a neutral setting.

•  Mud Shot and Fury Cutter have horrid defensive DPS.

• Ancient Power and Water Pulse give Kabutops a chance to use a charge move despite both being easily dodged.

• Though harder to dodge, Stone Edge requires too much energy for a Pokemon this frail.

Mud Shot and Fury Cutter* are very similar in performance, focusing on high energy generation to use charge moves sooner, at the cost of poor damage output. The former is generally recommended for its superior energy gains, and also due to the latter requiring an Elite TM to access. Waterfall is the direct opposite; opting for strong STAB damage output while providing below average energy generation. Rock Smash is a bad move and doesn't suit Kabutops. 

Ancient Power requires the least amount of energy, and is recommended primarily for this reason. While it's not particularly strong, Kabutops needs a charge move with low energy cost in order to not fall behind faster opponents. Stone Edge is strong with STAB, and costs a moderate amount of energy. Water Pulse is a poor move, but is the only coverage option available.