Weavile @ Life Orb / Choice Band
EVs: 252 Atk / 4 SpD / 252 Spe
IVs: 29 HP
- Ice Shard
- Icicle Crash
- Knock Off
- Low Kick / Swords Dance / Pursuit
some of the stuff hawlucha struggles against like talonflame, speedy electrics, and clef are probably gonna be easily handled by general glue mons on a build like chomp, lando-t, jirachi, mega scizor, latios, etc.. however, offensive threats like thundurus-i and tornadus-t are harder to deal with typically. weavile can handle these two offensive threats with ease thanks to its speed and powerful ice coverage. on the side of defensive checks to hawlucha, weavile helps to take down annoying bulky grounds that wall hawlucha like landorus-t, tankchomp, and gliscor, it helps against annoying fat psychic types like mew and slowbro, and it helps with lesser-used walls to hawlucha like zapdos and doublade (needs to be weakened a bit for knock to kill).
in general, hawlucha appreciates a speedy offensive pokemon to support its potential set-up. if hawlucha sets up mid-game, it appreciates a fast pokemon to clean after it puts a dent in a team, and if hawlcua sets up end-game, it appreciates a speedy, strong pokemon to deal enough damage for it to sweep efficiently. weavile works effectively in both these situations: weavile can deal nice damage & it has priority to clean end-game, and mid-game it can inflict serious damage with sets like band and SD. also, pursuit can be used against fat psychics i guess, but it doesn't really have much application here particularly imo :x.
in the beginning, i brought up how a lot of the common hawlucha answers are typically handled by other members of the team through glue mons. assuming you'll be building around hawlucha + (matchmaking pokemon), weavile provides something a bit clearer to build around than one of these general glue mons. it handles some of the more difficult to handle offensive checks to hawlucha while covering a good chunk of what can wall it (with exceptions like physdef unaware clef and mega sab), and it supports hawlucha setting up by either dealing damage mid-game for hawlucha to sweep, or cleaning up after a mid-game set-up by hawlucha.