Aqua Saint I is the 1st stage of Jumbo Invasion. Next stage: Aqua Saint II.
This stage exists to teach you Jumbo Jones, and the lesson is his drawn-out foreswing — the window where he can be punished for free.
- His knockback count is high relative to his HP, so adequately levelled rushers can chain him.
- Stack damage into each foreswing rather than trading with him.
- His range gimmick makes slow-moving attackers dangerous — anything caught by the second part of his Omni Strike will not survive it.
2.5M HP Angel Colossus Great Advent boss. First hit is a -300~450 Omni Strike for 20,000; the second lands 90,000 at 451~751 with a guaranteed 2-second Slow and a level 7 Wave Attack. Immune to Freeze and Weaken.
Behemoth 
Jumbo Jones is Angel. Anti-Angel units take less damage and deal more.
Jumbo Jones reaches 450 range. Units that out-range it can chip safely without taking hits.
MEDITATION CAT C Range 600 — fires from beyond its 450. 
ADULT CAT B Range 475 — fires from beyond its 450. 
NERD CAT A Range 1200 — fires from beyond its 450. Also fits “Clear the crowd.” 
MIGHTY REKON KORPS S Range 470 — fires from beyond its 450. Also fits “Burst the boss down.” 
DRILLER CAT A Range 460 — fires from beyond its 450. Jumbo Jones has a deep HP pool (2,500,000+ even before stage magnification). Heavy single-target burst shortens the fight.
BAHAMUT CAT S Huge multi-hit burst — a story-unlock powerhouse that deletes tanky enemies. 
KALISA S Big Massive-Damage Area hits. Also fits “Counter Angel.” 
GAIA THE CREATOR S Long-Distance multi-hit with Insane Damage — a generalist wall-cracker. 
CRAZED MONEKO A Big crit burst against tanky/Metal targets. MIGHTY REKON KORPS S Among the highest single-hit Area damage available. Also fits “Out-range Jumbo Jones.” 6 enemy types stack up here. Area attackers hit the whole push at once instead of one unit at a time.
HITMAN CAT A Area attacks hit everything in range. 
SALON CAT S Hits whole crowds, and is Weaken-immune so it keeps firing through Weaken stages. NERD CAT A Evolved/True hit groups over a Long Distance band. Also fits “Out-range Jumbo Jones.” KALISA S Fast Area damage clears Angel groups. Also fits “Counter Angel.” 
JAGANDO JR. A Area attacks hit everything in range. WIKI PICK = listed on the stage's Battle Cats Wiki page; COMMUNITY = found by title, channel and date. Neither is verified by Claws' Den. Nothing loads from YouTube until you press play. Find more on YouTube ↗
The castle you destroy to clear the stage.