3-10 TRITON
3-10 Triton is the 10th stage of Cosmos Ch.3 — Even Stars Burn Out. Previous stage: 3-9 Neptune. Next stage: 3-11 Pluto.
Kid Tappa carries a Barrier (up to 15,000 HP) — your hits are absorbed until it's broken.
LI'L GROSS CAT B 30% Barrier Breaker. Also fits “Counter Alien.” 
SPACE CAT A 50% Barrier Breaker. 
FENCER CAT A Guaranteed 100% Barrier Breaker at long range — the reliable accessible breaker. 
BORA S 100% Barrier Breaker reliably cracks Star Alien Barriers. Also fits “Counter Alien.” 
LUMINA S 100% Barrier Breaker opens Star Alien Barriers for the team. Also fits “Counter Alien.” 
SKIRT CAT B 30% Barrier Breaker. Kid Tappa, Cyberhorn, Shibalien Elite and Elizabeth the LVIth are Alien. Anti-Alien units take less damage and deal more.
GROSS CAT A Its True Form is Strong Against Alien, giving budget anti-Alien value. LI'L GROSS CAT B True Form has a 30% Knockback vs Alien. Also fits “Break the Barrier.” 
BAKERY CAT A Curses Alien enemies. 
LITTLE LEAGUER CAT S Resistant vs Alien and Long Distance — a budget anti-Alien backliner. Also fits “Break the Barrier.” 
GRAVI S Resistant to Alien and breaks Alien Barriers. Also fits “Break the Barrier.” Kid Tappa: 40k HP + 15k Barrier, low damage. Can be used as a stepping stone for Crimson Mina / Polevaulter / Jellycat once the Barrier breaks.
Cyberhorn joins the peon mix at extreme melee DPS (16-frame attack interval, 2,200 AP at 60 range). Kid Tappa stays as anchor wall, Shibalien Elite + Elizabeth the LVIth keep the wave attack pressure. r/battlecats's note here: 'Triton Ch.3 is a deceptive stage — the lack of restriction makes players relax, then Cyberhorn one-shots their frontline.' Lineup: deep meatshield wall (Manic Mohawk + Manic Lion + Manic Eraser) → Anti-Alien Ubers with range (Bazibastra, Lumina, A. Bahamut) → Wave-Immune frontline if you're playing slow. Common failure: bringing Bahamut Cat alone for melee DPS. Cyberhorn out-DPSes him in close range; you need to outrange or interrupt before Bahamut reaches the line.
The castle you destroy to clear the stage.