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.