Is weezing viable in this tier? He has quite a bit of use in RU. Any experience with him here?
Weezing is a pretty good physical wall, which is able to counter Mega Beedrill pretty decently
252 Atk Beedrill Knock Off (97.5 BP) vs. 252 HP / 252+ Def Weezing: 75-89 (22.4 - 26.6%) -- possible 5HKO after Black Sludge recovery
That's the strongest move it can dish out against Weezing. Weezing can WoW, use Flamethrower, etc back.
Other mons include Adamant LO Lucario, Mega Aero,
Check to Mega Absol (assuming no mixed sets and doesn't get the +2 boost), etc..
+2 252+ Atk Life Orb Lucario Close Combat vs. 252 HP / 252+ Def Weezing: 157-186 (47 - 55.6%) -- 19.1% chance to 2HKO after Black Sludge recovery
252+ Atk Mega Aerodactyl Stone Edge vs. 252 HP / 252+ Def Weezing: 118-139 (35.3 - 41.6%) -- 81.3% chance to 3HKO after Black Sludge recovery
252 Atk Mega Absol Knock Off (97.5 BP) vs. 252 HP / 252+ Def Weezing: 112-133 (33.5 - 39.8%) -- 30.4% chance to 3HKO after Black Sludge recovery
Weezing most certainly does have a place in UU atm, but keep in mind of the top 3 threats in UU can easily set up and/or outright KO Weezing:
Mega Alakazam
252+ SpA Mega Alakazam Psyshock vs. 252 HP / 252+ Def Weezing: 230-272 (68.8 - 81.4%) -- guaranteed 2HKO after Black Sludge recovery
^still really impressive IMO, but if they run Psychic, you're just gone...
252+ SpA Mega Alakazam Psychic vs. 252 HP / 0 SpD Weezing: 542-638 (162.2 - 191%) -- guaranteed OHKO
Zygarde
Resists Poison/Fire coverage and can set up a Sub and just boost away to its heart's content (biggest liability IMO since this can literally cost you the game). But, if you run into DD Set with Lum Berry and WoW 2x, you have a chance to survive the +1 Outrage and WoW again, but that is again assuming it's not the SubCoil set
+1 252+ Atk Zygarde Outrage vs. 252 HP / 252+ Def Weezing: 171-202 (51.1 - 60.4%) -- 92.6% chance to 2HKO after Black Sludge recovery
Suicune
Doesn't care about Poison/Fire coverage, being statused and can set up effortlessly on Weezing. At +1, Weezing will be scrambling to do anything...
+1 4 SpA Suicune Scald vs. 252 HP / 0 SpD Weezing: 160-189 (47.9 - 56.5%) -- 33.2% chance to 2HKO after Black Sludge recovery
So, overall, Weezing is a good choice for UU, but you need to keep in mind the top threats in UU also threaten Weezing, so you need to add mons to cover them specifically. It's tough because Mega Zam is a wallbreaker and Ziggy/Cune are wincons. If you want a mon that can do a decent job at checking all 3, you can try CB Infiltrator Spiritomb, believe it or not. I ran it for DH and it's completely underestimated. It beats/traps Mega Zam whether behind a sub or not. Zygarde can be burned/tricked a band (really helpful if it's SubCoil since dragon/ground spam isn't great by themselves) and Suicune does not want a Band at all.
That's just my personal preference for those 3 mons since it can check all 3 with relative ease.