1-43 BROTON
1-43 Broton is the 43rd stage of Cosmos Ch.1 — Beyond the Exosphere. Previous stage: 1-42 Gorigori. Next stage: 1-44 Crimson Star.
Shibalien and Kroxo 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. 
BAKERY CAT A Curses Alien enemies. Also fits “Counter Angel.” 
SURFER CAT A Area Freeze vs Alien controls Alien groups. Also fits “Clear the crowd.” 
CATMAN S Deals Massive Damage to Alien in every form. Also fits “Clear the crowd.” Gabriel is Angel. Anti-Angel units take less damage and deal more.
LI'L AXE CAT C True Form (Li'l Dark Cat) is Strong against Angel. BAKERY CAT A Curses Angel enemies. Also fits “Counter Alien.” 
CATWAY A Strong against Angel. Also fits “Counter Dark.” 
KALISA S Deals Massive Damage to Angel enemies. Also fits “Clear the crowd.” 
PHANTOM CAT A Massive Damage to Angel from Long Distance. Doge Dark is Dark. Anti-Dark units take less damage and deal more.
CATS IN A BOX B True Form has a 30% chance to Weaken Dark enemies. 
JETPACK CAT A Resistant to Dark — durable against Dark attackers. Also fits “Counter Alien.” CATWAY A Strong against Dark. Also fits “Counter Angel.” 
GUNDUROS S Massive Damage + KB + Slow vs Dark. Also fits “Counter Alien.” 
DOM CAT B True Form (Dark Lazer) is also Strong against Dark. 8 enemy types stack up here. Area attackers hit the whole push at once instead of one unit at a time.
VALKYRIE CAT A Hits the whole group while it freezes them. 
WHEEL CAT A Hits every Alien in a wide area at once, melting grouped Star Aliens. Also fits “Counter Alien.” SURFER CAT A Area damage hits grouped enemies. Also fits “Counter Alien.” 
MOMOTARO S Area damage clears Red/Angel groups. Also fits “Counter Angel.” 
ACTRESS CAT B Hits multiple enemies at once for budget crowd damage. Mystery Mask cluster stage — collecting these treasures weakens The Cat God to a beatable 100% at stage 48. Light peon stage.
First Mystery Mask stage. Its treasure (Transmission) is one of three needed to weaken The Cat God at 1-48 from 1,100% to 100%. Easy stage by Ch.1 standards: Those Guys + Snache + Shibalien, no boss. Standard 'farm' loadout: anything that can finish under three minutes. r/battlecats: 'don't skip this. You'll regret it at Big Bang.' Common failure: ignoring the Mystery Mask grind and then attempting 1-48 with un-weakened Cat God — that's the path to 30+ retry attempts. Collect superior treasure (~30% drop) before moving past stage 43.
The castle you destroy to clear the stage.