Players who want to see how Samurott balances in Pokémon Go after Oshawott's Community Day, want to review this Pokémon's move set improvements and take a look at its current stats. Overall, Samurott is a Pokémon that can do quite a bit of damage, but being a Water-type with flimsy defenses, you won't want to put all your hopes on it. However, there is a place for Samurott in the Pokémon Go meta, and it can be good if you know how to use it effectively.
Samurott is purely a Water-type Pokémon. It will be weak against Electric and Grass-type moves, but is resistant to Fire, Ice, Steel, and Water-type moves. When used in PvP, he has a maximum CP of 2.826, an attack of 179, a defense of 135, and a stamina of 182. One of Samurott's most significant weaknesses is how low his defenses are, making him a target vulnerable in PvP. Therefore, you mainly want to reserve it as a Pokémon Switch or Closer in your lineup, reserving it as a last resort or trading it with your primary Pokémon during a battle. If you have stronger closer Pokémon with high defense, definitely keep it as your final choice.
Samurott has an interesting moveset. The best moveset he can learn is the fast-moving cutter fury and the charged hydrocannon and megacorn moves. Since he has two Bug-type moves as his best attacks, he'll be very effective against Dark, Grass, and Psychic-type Pokémon, making him a good choice for the Grand League and Ultra League. However, you want to avoid using it in the Master League due to its lower maximum CP.
When it comes to using a Samurott in the Great or Ultra League, the best IVs will be 14/4/5 for the Great League and 13/4/14 for the Ultra League. You want to try to push his defense and stamina as high as possible, making sure he can stay in combat for as long as possible.
Unfortunately, while Samurott improves significantly by introducing the Hydrocannon into his move set, you won't be able to make too many sketches with it on your list. It can certainly be an interesting choice, depending on the Pokémon team you use, but you will find that there are better Water-type choices to choose from in both league categories.
Overall, Samurott can be a difficult Pokémon to balance in PvP. We recommend that you test it yourself and find suitable team partners that protect against its electric and grass type weaknesses.