This deck was built for my locals Classic+ Format which features decks under $185 for Main, Side, and Extra Deck.
Goal: Summon Big Boi Coelacanth, go TurboTastic, end board with multiple "no's". Generally by dumping Coelacanth with Lifeless Leafish, stacking into Dugares, and then going full Turbo.
General Turn 1 examples:
Special Tenyi-Shthana, Normal Lifeless Leafish, dump Fish Boi, make Dugares, special Fish Boi, turbo
Summoner Monk, discard spell, special Leafish, dump Fish boi, make Dugares, special Fish Boi, TURBO
One for One into Beutunaful Princess, special Leafish, dump Fish boi. Summon another level 4 fish (White Stingray, Silent Angler, etc.), make Dugares, TURBO
Once you go Turbo, make sure you grab Oyster Meister and Royal Swamp Eel as a baseline and summon 2 other fish situationally. You can generally make a Link-2 out of Dugares and Coelacanth, then make either Abyss Dweller or Bahamut into Toadally Awesome. Once you've made some space, synchro into Monoceros, special Coelacanth back and then discard a card to summon Fishborg or another Swamp Eel out. Then you can easily go into Dragite, turn the token into a Linkuriboh and then use the Link-2, Linkuriboh, and Big Fish Boi to make Apollousa.
Important card explanations:
Deep Sea Dive/Guitar Gurnards: One card combo to make Dragite or Monoceros. Diva can also summon Minstrel to fill graveyard and stack an extender on top of the deck.
Eria: My choice for a generic Link-2. Has some functionality against decks that run Water Monsters and is a Water monster itself (works with Abyss Dweller).
Deep Sea Minstrel: Crucial to pick out Ash Blossom or Impermanence out of your opponent's hand before going Turbo. Also provides synergy with Diva.
Linkuriboh: Generic Link-1, ideally turns your Oyster Token into something that can make Apollousa. Can also be summoned from the grave with Beautunaful Princess to deal with big boss monsters during battle phase.
Other Possible Budget Card Choices (not included):
Knightmare Phoenix: Pops Macro Cosmos or Dimensional Fissure. Having access to the grave is critical for the deck.
Glacial Beast Iceberg Narwhal: Great finisher card, helps insure lethal.
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this is a WIP and will be updated as I prepare to enter tournaments in the future. Feedback welcome. Enjoy!)