Gem Grab · Current Ranked map

Best Brawlers for Undermine

Which brawler should you choose on Undermine? Below are the win rates BrawlPick observed for 106 brawlers on this Gem Grab map, from roughly 7,023 battles. The most reliable strong performer in this sample was Cosmo, winning 67.7% of 248 games. Every number comes with its sample size.

Data last updated September 19, 2026. Only brawlers with at least 30 observed games on this map are included.

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Strongest observed brawlers on Undermine

Ordered by the low end of each brawler's 95% range, not by raw win rate, so a high number from a small sample doesn't jump to the top. The range shows how much the true win rate could plausibly differ given the number of games.

Brawler	Win rate	95% range	Games
Cosmo	67.7%	62–73%	248
Sam	69.1%	57–79%	68
Amber	59.8%	56–63%	866
Gus	57.6%	55–60%	1,256
Najia	64.4%	55–73%	104
Nori	58.2%	54–62%	667
Doug	61.7%	54–69%	162
Wendy	57.8%	53–62%	479
Starr Nova	57.6%	53–62%	498
Bo	55.7%	53–58%	1,414

Promising, but not enough games yet

These brawlers won often on Undermine but appear in fewer than 150 observed games, so their win rate is much less certain.

Brawler	Win rate	95% range	Games
Jae-Yong	63.3%	51–74%	60
Juju	60.4%	46–73%	48
Trunk	60.1%	52–68%	148
Glowy	59.6%	50–68%	109
Ziggy	59.3%	47–71%	59

Most played on Undermine

Brawlers that appeared in the most observed games. Popular is not the same as strong — compare the win rates.

Brawler	Win rate	Games
Mortis	50.5%	2,497
Rico	51.6%	1,735
Griff	52.1%	1,634
Edgar	45.4%	1,422
Bo	55.7%	1,414

Lowest observed win rates

Brawlers whose win rate on Undermine was clearly low in this sample, even allowing for its size. This can reflect the map, the draft situations they were picked into, or who played them — not necessarily that the brawler can't work here.

Brawler	Win rate	95% range	Games
Jacky	27.4%	20–37%	106
Tick	36.5%	33–41%	570
Squeak	36.2%	31–42%	287
Berry	34.1%	27–43%	132
Frank	36.6%	31–43%	235

All 106 brawlers on Undermine

Brawler	Win rate	Games
Sam	69.1%	68
Cosmo	67.7%	248
Najia	64.4%	104
Jae-Yong	63.3%	60
Doug	61.7%	162
Juju	60.4%	48
Ruffs	60.4%	169
Trunk	60.1%	148
Amber	59.8%	866
Glowy	59.6%	109
Ziggy	59.3%	59
Finx	59.2%	98
Willow	58.9%	56
Charlie	58.6%	222
Nori	58.2%	667
Wendy	57.8%	479
Janet	57.8%	206
Starr Nova	57.6%	498
Gus	57.6%	1,256
Bolt	56.6%	380
Mico	56.3%	71
Lola	56%	91
Shade	55.9%	792
Sprout	55.9%	59
Hank	55.8%	43
Bo	55.7%	1,414
Damian	55.6%	135
Chuck	54.7%	161
Nani	54.6%	77
Tara	54.3%	661
Ash	54%	925
Draco	53.9%	89
Ollie	53.4%	163
Pearl	53%	317
Carl	53%	385
Moe	52.8%	159
Stu	52.7%	658
Pam	52.2%	255
Lumi	52.1%	190
Griff	52.1%	1,634
Bull	52%	446
Chester	51.9%	441
Mina	51.7%	418
Rico	51.6%	1,735
Kenji	51.5%	357
Kit	51.3%	232
Lily	51.2%	377
Clancy	51.1%	307
8-Bit	50.8%	534
El Primo	50.7%	629
Bonnie	50.6%	83
Mortis	50.5%	2,497
Pierce	50.5%	882
Maisie	50.4%	264
R-T	50%	36
Gigi	49.6%	125
Emz	49.6%	1,251
Colette	49.5%	719
Buster	49.5%	103
Lou	49.5%	192
Fang	48.4%	514
Meeple	48.3%	331
Surge	48.3%	1,140
Sirius	48.3%	205
Alli	48%	348
Otis	48%	342
Max	47.9%	520
Poco	47.8%	538
Jessie	47%	428
Cordelius	46.9%	260
Penny	46.9%	286
Gray	46.8%	79
Eve	46.8%	124
Kaze	46.8%	169
Leon	46.1%	516
Spike	45.6%	480
Edgar	45.4%	1,422
Sandy	45.4%	262
Mandy	45.3%	150
Crow	45.3%	873
Barley	45.2%	146
Buzz	45.2%	310
Bibi	45.1%	614
Brock	43.4%	806
Colt	43.3%	647
Meg	43.3%	400
Gale	43%	221
Byron	42.6%	312
Piper	42.4%	304
Nita	41.5%	316
Darryl	41.3%	225
Mr. P	41.2%	114
Shelly	40.7%	273
Dynamike	40.4%	349
Larry & Lawrie	39.4%	99
Belle	39%	100
Melodie	38.6%	153
Grom	38.5%	104
Bea	38%	150
Gene	37.1%	159
Rosa	36.7%	207
Frank	36.6%	235
Tick	36.5%	570
Squeak	36.2%	287
Berry	34.1%	132
Jacky	27.4%	106

How to use these numbers

These are observed results, not a prediction. A win rate also reflects who played the brawler and the drafts it was picked into: a brawler that is usually chosen as a counter will look stronger than it would as a blind first pick.

Use the table to shortlist brawlers for Undermine, then choose based on your draft: what was banned, what your team needs and what the enemy picked. That last step is what the BrawlPick picker does for you.

About this data

Source:: battle logs from the official Brawl Stars API, collected by BrawlPick. Not copied from another site.
Players:: seeded from BrawlPick users, public leaderboards and top clubs, then widened to the players they met. Likely skewed toward more active, higher-skill players; not a random sample.
Battles:: every 3v3 battle with a win or loss on the map (Ranked and regular matches), each counted once even if seen through several players. Mostly from the few days before the update date.
Win rate:: share of a brawler's appearances where its team won. Both teams are counted, so the average is about 50%. "Games" is the number of appearances.
Small samples:: brawlers with fewer than 30 games on a map are left out; the 95% range shows the remaining uncertainty.
Game version:: not recorded per battle. If a balance update landed after the update date, these numbers predate it.

Full methodology: how BrawlPick works.

More Gem Grab data and guides

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