Player one
A/D move · W jump · S down · J/K/U/I = 1/2/3/4 · L dodge.
COS:CORE ARENA / ORIGINAL BROWSER PRACTICE
COS:CORE Arena.
Train the Decision. Master the Fight.
One whiff can cost a stock. Dash-dance into range, land a clean strike, or bait the punish in a fast, local stick-fighter duel. Train solo or play a couch match.
An original Coach Cosmic browser arena inspired by platform-fighter decisions. It uses no Brawlhalla client, game files, physics, or frame data.
No recordingRecord up to 5 seconds of your inputs; the dummy repeats them.
P1 0% · 3 stocks | P2 0% · 3 stocksSpacing and fighter states appear here.
Customize keyboard controls
Choose a button, then press a key. Mappings save on this device. Gamepads use their standard face buttons and shoulder buttons.
ActionPlayer onePlayer two
Left
Right
Down
Jump
1 · Light punch
2 · Heavy punch
3 · Light kick
4 · Heavy kick
Dodge
10-move command list
1 right jab → 2/3/4 · 2 left jab → 3/4/special · 3 right kick → 4/special · 4 heavy left kick · Down + 3 low sweep · Down + 4 heavy sweep · Down, Back + 2 Dragon Punch · Down, Forward + 1 Energy Ball · 1 + 2 push-back grab · 2 + 3 hip toss.
Double-tap toward or away from the opponent within 12 frames to dash. Forward dashes cancel instantly into extended-reach jabs. Hold away to guard mids. Begin guard exactly one frame before impact for a perfect block. Low sweeps and grabs bypass standing guard.
Ready. Practice one decision at a time.
Player two
Arrow keys move/jump/down · N/M/,/. = 1/2/3/4 · / dodge. Gamepads use four face buttons, triggers to jump and shoulders to dodge.
Practice cue
Dash into a confirmed chain, launch with Dragon Punch, bind with airborne Heavy Kick, then sustain the Airborne Float with timed normals or up to three Energy Balls. Press Space to pause.
This page runs entirely in your browser. Controls and training outcomes are labeled for assistive technology. The moving arena remains a visual practice exercise; use the text telemetry and status region for key results. Virtual units and frame advantage are COS:CORE Arena estimates, not Brawlhalla frame data.