"Pokemon Go" players may notice several changes to movesets. The server-side adjustments were made to the Game_Master file by Niantic Labs on Aug. 19, 2016, resulting to several "Pokemon Go" moves getting changed or deleted entirely.
"Pokemon Go" players from Reddit noted that a number moves were taken out of the Game_Master file, namely the Dragon Breath of Gyarados, the Moonblast of Mew, and the Acid by Weezing and Koffing. Several moves were also altered in "Pokemon Go," including Chansey's Psybeam to Hyper Beam, Gengar's Sludge Wave to Sludge Bomb, Grimer's Acid to Poison Jab, Hitmonlee's Stop to Brick Break, Mew's Hurricane to Blizzard, Jigglypuff's Play Rough to Dazzling Gleam, Muk's Acid to Lick, Seel's Water Gun to Lick, Omastar's Rock Throw to Mud Shot, and Starmie'sPsybeam to Pyschic.
Heavy also reported that some Quick Attacks were changed in "Pokemon Go," namely Porygon's Quick Attack to Zen Headbutt, and Starmie and Staryu's Quick Attack to Tackle.Digett, Dugtrio, Golem and Graveler's Mud Shots were changed to Mud Slap. "Pokemon Go" players cited that Rock Throw used to be one of Omastar's most important weapons. The adjustment to Dugtrio makes it even less viable. Golem's defense improved, but got worse on offense. Gyarados is no longer as effective in countering Dragonite as before.
Mud Shots are faster but deal less damage. Mud Slaps are slower but deal more damage over time. Mud Shots are more practical, while Mud Slaps are ideal for defense in "Pokemon Go." The change in Gyarados did not affect its best quick move. Psychic is a plus for Starmie, although its best moveset remained the same. Hydro Pump is still better than Psychic and Tackle, while Water Gun is the best quick move.
"Pokemon Go" trainers had mixed reactions with the recent adjustments in the movesets. The new deletions and changes will not affect current Pokemon that "Pokemon Go" players already have, but they will see the differences in future Pokemon that they acquire. Eggs that players acquired before the recent patch will still feature pre-patch moves when these hatch. More updates and details on "Pokemon Go" are expected soon.