Moveset Changes (August 19th) Chansey is the big Winner!

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On August 19th, Niantic changed the Movesets of 18 different Pokémon. While some were minor changes, others were pretty significant.

Overall the Pokémon that benefited most from this recent update was Chansey. Originally, Chansey had the Charge Move Psybeam. Being a Normal Type Pokémon, meant that Chansey's Psybeam did not benefit from STAB (Same type attack bonus). However, with the recent change, Chansey now has the capability of using Hyper Beam, a Normal Type Move, which does benefit from STAB. Not only that, Hyper Beam now does almost 20 more DPS than that of the original move Psybeam.

Now, some Pokémon were not so lucky, which include Seel and Jigglypuff. Seel originally had the Move Water Gun, which did 15 DPS (w/ STAB), but now has Lick, a Ghost Type Move, which does only 10 DPS as it does not benefit from STAB.

Jigglypuff got the worst of this new update as it lost Play Rough and gained Dazzling Gleam. Both benefit from STAB, but the change results in a -7.3 DPS change for this particular Moveset comparison. 

Other Pokémon such as Staryu, Starmie and Grimer saw slight gains in DPS, while it seems some Moves were removed (Gyarados and Dragon Breath). At this time there seem to be conflicting reports between players on Gyarados' Moveset.

Please note that these changes were made in the Pokémon Go game file, but have not yet been officially confirmed on Niantic's blog (Updated Last: August 20th).

Changes to Movesets (August 19th)
#	Pic	Pokemon	Old Move	Old DPS	New Move	New DPS	DPS +/-
#113		Chansey	Psybeam	10.5	Hyper Beam	30.0	19.5
#106		Hitmonlee	Stomp	14.3	Brick Break	23.4	9.2
#120		Staryu	Quick Attack	7.5	Tackle	10.9	3.4
#121		Starmie	Quick Attack	7.5	Tackle	10.9	3.4
#088		Grimer	Acid	11.9	Poison Jab	14.3	2.4
#137		Porygon	Quick Attack	9.4	Zen Headbutt	11.4	2.0
#094		Gengar	Sludge Wave	25.7	Sludge Bomb	26.4	0.7
#151		Mew	Hurricane	25.0	Blizzard	25.6	0.6
#050		Diglett	Mud Shot	13.6	Mud Slap	13.9	0.3
#051		Dugtrio	Mud Shot	13.6	Mud Slap	13.9	0.3
#075		Graveler	Mud Shot	13.6	Mud Slap	13.9	0.3
#076		Golem	Mud Shot	13.6	Mud Slap	13.9	0.3
#109		Koffing	Acid	-	Removed	-	0.0
#110		Weezing	Acid	-	Removed	-	0.0
#130		Gyarados	Dragon Breath	12.0	Removed	-	0.0
#089		Muk	Acid	11.9	Lick	10.0	-1.9
#086		Seel	Water Gun	15.0	Lick	10.0	-5.0
#039		Jigglypuff	Play Rough	23.7	Dazzling Gleam	16.4	-7.3