Gull Coast is the first stage in Alcatraz, sub-chapter 17 of Stories of Legend.
The level starts off with a Hippoe, Snache, Those Guys, and Gory. All units spawn at a constant rate, with Snache and Those Guys serving as peons, Hippoes being the tanky units, and the Gories as the heavy-hitters. After getting the Enemy Base down to ≈520,000 HP, 3 Bores appear as the bosses in this stage.
Cat Lineup: 2-3 Meatshields (Mohawk Cat, Eraser Cat, etc.), some ranged attackers (Macho Legs Cat, King Dragon Cat, etc.), good tanky/area attackers (The Flying Cat, Jamiera Cat, etc.), and some anti-red units for the Bores (Dark Cat can serve as both an attacker and a meatshield, Island Cat) and Bahamut Cat.
Recommended Power-Ups: Rich Cat, Cat CPU.
Before the boss:
Spawn your meatshields and Bahamut to take care of the Gories and Hippoes. Once your wallet reaches a satisfactory amount of money, spawn your ranged units and area attackers.
During the boss:
Keep Bahamut protected as much as you can by spawning your tanky units, and be sure to spawn your meatshields and ranged attackers as well, but keep track of your money too!
After the boss:
All that's left in your way are Gories and Hippoes. With the massive army you've created, they shouldn't be much trouble for you. Destroy the Enemy Base, and win the level!