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Muk is a Poison Pokémon which evolves from Grimer. It is vulnerable to Ground and Psychic moves. Muk's strongest moveset is Poison Jab & Gunk Shot and it has a Max CP of 2,757.
"From Muk's body seeps a foul fluid that gives off a nose-bendingly horrible stench. Just one drop of this Pokémon's body fluid can turn a pool stagnant and rancid."
Poison Jab is recommended for its STAB damage output and above-average energy generation.
Thunder Punch is Muk's cheapest charge move energy-wise, and provides valuable coverage against common Water and Flying Pokemon. Dark Pulse features a balance between energy cost and damage output, and also provides coverage against Muk's weakness to Psychic-types. Acid Spray provides utility with its guaranteed -2 DEF debuff on the opponent, but it costs less energy to bait shields with Thunder Punch instead. Sludge Wave costs less energy than Gunk Shot if a high damaging charge move is needed, but Poison-type attacks aren't very valuable generally speaking.
Muk is a mono-Poison type with respectable bulk. Updates to its movepool throughout rebalances in 2019 have improved Muk's performance in the meta, with Thunder Punch being a valuable asset against common Water and Flying picks, while Dark Pulse and Acid Spray provide accessible options compared to Muk's more expensive charge moves. Unfortunately Poison-typing isn't very useful in the meta partly due to the frequency of Steel-types, and Ground-type coverage is quite common among various meta Pokemon.
As a Poison-type, Muk is mostly a niche pick to counter certain Pokemon like Fairy-types and Virizion. Ubiquitous Steel-types in this league makes it difficult to justify Muk as a pick on the roster, while access to Dark Pulse is inadequate when dealing with bulky Psychic-types.
With a max CP of 2757, Muk lacks sufficient stats to perform well in Master League.
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