Grom

Who is Grom

Grom is a Epic-rarity brawler of class Artillery. This article summarizes their performance in the current competitive meta: best map, hardest counters, and the weekly trend of their win rate. The numbers come from top-PRO battles over the last 14 days, Bayesian-smoothed so a brawler with a small sample doesn't show a misleading percentage.

Over the 14-day window, Grom has shown up in 3,710 battles with a global win rate of 71.3% and a pick rate of 0.4%. That pick rate is the share of matches where a top-PRO player chose Grom out of every available brawler, so it works as a thermometer for how meta they are right now.

Across the full roster, Grom's trend is among the strongest: their win rate is climbing faster than 90% of brawlers with a measurable trend this week. When a brawler rises this fast it's usually because maps or modes rotated in where their kit fits better than average.

Grom is an Epic brawler, a rarity where kits start to break conventions: unique mechanics, supers with special effects and gadgets that flip the whole game plan. The gem or Star Drop investment is steeper, but in return you get a tool that defines entire lanes in draft and tends to be picked in tournaments whenever its signature map enters rotation.

Best maps for Grom

The best map for Grom is Healthy Middle Ground in Knockout, with a Bayesian-adjusted win rate of 81.0% over 91 battles. That puts them above their class average in this mode, so it's worth picking Grom when that rotation is live. A strong run on Healthy Middle Ground usually combines favorable geometry (short ranges or cover) and a mode whose objective plays into the brawler's kit.

Grom's performance is highly map-dependent: there are 42.5 percentage points between their best and worst map. That high variance means it pays to check the rotation before locking them in, because the same brawler swings from one of the best options to a clearly unfavorable pick depending on the map.

As a second map option, Grom also performs well on Crab Claws (Knockout) with a 77.4% win rate, only 3.6 points off their best map. When the gap between the top two maps is this small, picking one over the other comes down to the enemy team more than the brawler itself.

Rounding out the podium, Grom holds a 75.9% win rate on Goldarm Gulch (Knockout) over 231 battles. Having three competitive maps widens the rotation windows worth bringing them in for, not just their signature map.

Just above their worst result, Grom also struggles on Pocket Pass, where their win rate sits at 45.7%. Keep this map on your radar as a second warning sign when deciding the pick.

On the opposite end, Hyacinth House (Hot Zone) drops Grom's win rate to 38.5%. That's the bottom tail of a 42.5-point range between their best and worst map, so if that rotation comes up during a session, consider a different brawler to avoid throwing matches.

Counters and matchups

Grom clearly dominates the matchup against Dynamike: across the 197 recorded battles for that pairing, their win rate climbs to 78.4%. If you spot Dynamike on the enemy team in draft, that lane is an edge for Grom — seek the duel out rather than avoid it.

Their second-best matchup is against Rico, where Grom holds a 77.3% win rate over 423 battles. Two strong favorable counters like these give Grom real value as a targeted pick against comps that lean on those two brawlers.

Where Grom has a clear disadvantage is against Barley: their win rate drops to 62.8% across the 21 battles recorded for that matchup. If Barley shows up on the enemy team, consider not picking Grom or changing the game plan to avoid the shared lane, because Barley wins that exchange.

Per-brawler matchups are the smallest-sample metric on the page: for Grom the samples range from 21 to 541 battles. Read them with the confidence that sample implies — a matchup at the low end says far less than one backed by the high one.

This section lists the matchups where Grom performs worst and best over the last 90 days, sampled from top PRO players and smoothed with Bayesian WR to avoid noise.

Read each row left to right: brawler, win rate vs Grom, and battle sample. The larger the sample, the more reliable the number.

Loses most against

Brawler	WR	Battles
Barley	62.8%	21
Mortis	63.0%	541
Bull	67.7%	190
Colt	72.4%	459
Nita	72.7%	91

Dominates

Brawler	WR	Battles
Dynamike	78.4%	197
Rico	77.3%	423
Spike	76.4%	186
El Primo	75.0%	94
Brock	74.9%	364

Star Powers, gadgets and hypercharge

To get the most out of Grom in the current meta, prioritize upgrades by synergy with their kit, not by gem cost. Star powers, gadgets and hypercharge change tiers depending on the meta, so the upgrade priority is dynamic.

As a general rule, the first profitable upgrade for Grom is usually the star power with the highest pick rate in PRO tournaments, followed by the gadget that best fits their role (lane, support, or pick). Hypercharge, when it exists, comes last because it costs more Coins and Power Points and only triggers with a full super bar.

By game mode, Grom performs best in Knockout, with a 73.2% win rate over 2,273 battles — the mode with the most recorded sample for this brawler. That makes Knockout the context where their performance is most reliable and where investing in upgrades pays off most clearly.

Beyond the immediate meta, the upgrade path for Grom should prioritize what moves the win rate needle the most: power 11 before gears, first star power before second, primary gadget before any hypercharge. Hypercharges cost a lot of coins and power points and only activate with a full super bar, so their real priority drops toward the end of the checklist.

Weekly meta analysis

Over the last 7 days, Grom's win rate moved from 64.8% to 70.1%, a climb of +5.3 points versus the previous half of the window. Since each half clears the 3-battle minimum, that move isn't noise: it reflects the meta shifting in Grom's favor, usually from a rotation of maps or modes where they perform better.

Compared with the rest of the roster, that move puts Grom climbing faster than 90% of brawlers with a measurable trend this week — they're at the top end of the risers. When a brawler lands in that band it's often a good moment to invest in their upgrades before a possible nerf arrives.

Every percentage on the Grom page comes from sampling top PRO battles with source=global filtering and Bayesian smoothing, recomputed every six hours. If you want to understand why one map performs better than another or how a rotation affects the win rate, the methodology page covers the technical detail step by step.

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