If you don't have enough pearls or the time to grind it out, consider spending some real-world cash on one of these:
Bundle Help Pack ($0.99): Three tentacle grips, three miracle tentacles, one Kraken, five cocktails, six sushi, five shuriken and five jellyfish. A 5,000 pearl value.
Chariot Help Pack ($1.99): Ten tentacle grips, ten miracle tentacles, three Kraken, 15 cocktails, 15 sushi, 15 shuriken and 14 jellyfish. A 15,000 pearl value.
Turtle Help Pack ($3.99): Ten Kraken and all your item slots filled with 99 items for a value over 100,000 pearls.
Kraken Eye ($2.99): Level up all Squids to max level.
Legendary Treasure ($4.99): The Legendary Treasure will unlock all missions, Squids, Seahorses and helmets from the game, as well as level up all Squids to max level and credit 500,000 pearls.
Kickstarter Pack ($1.99): For the price of a candy bar, unlock nine helmets from Squids 1 (customization only, no bonus stats) and support Squids developers so they can make free updates and new games.
Ultimate Squids Fan ($4.99): For the price of a burger, unlock the exclusive Ragnarok helmet (customization only, no bonus stats) and support Squids developers so they can make free updates and new games and love you forever.
Explore the galaxy in the franchise's first open-world game.