Jelly Challenge

Jelly Challenge is an event similar to Extreme Challenge (November 2014 event, April 2015 event) and Infinity Jelly Challenge in which players have to finish progressively more difficult missions regarding jellies in order to obtain rewards.

Rules

 * 1) Players can see the goal list by tapping Jelly Challenge button at the top right corner of the home screen.
 * 2) Players are required to reach the goal within one play (not a combination of several plays) in order to receive the reward. Players can check the goal progress while playing and when the goal is achieved, a green check mark will appear in game and the next goal will appear.
 * 3) Players can only achieve one goal for every run. The player must end the current game before a new goal will open.
 * 4) Players can achieve the goal in every episode including the Ghost Pirate's Island of Coins. The only excluded episode is the Tower of Frozen Waves.
 * 5) Cookie Relay use is allowed.
 * 6) Goals must be achieved before the game ends. Bonuses that will appear in Game Windows will not affect the goal. (For example, when the goal is Collect 1000 coins, the player must have to collect 1000 coins in game before the game ends, and coin bonuses from treasures do not apply.)

Collect Alphabet Jelly

 * Mocha Delight will be your friend.
 * Use Apple Cookie and Yule Log Cake in Escape from the Oven or The City of Wizards. The City of Wizards gives a more stable amount of Alphabet Jellies than Escape from the Oven.
 * You can also use Tea Cup.

Collect Coins in Bonus Time

 * Cozy Yarn and Magic Pod, along with Apple Cookie, will help you get into Bonus Time frequently to collect the coins you need.
 * Strawberry Cookie will give you additional time in Bonus Time for you to collect coins.

Collect Colorful Star Jelly

 * Blackberry Cookie and Ghost Butler will be able to generate a lot. Doing it in Dragon's Valley is ideal. Try not using Fast Start so you can produce two more Colorful Star Jellies at Stage 1.
 * Ms. Do-Re-Mi's Star Firework Potions does NOT count towards the goal, so don't bother using her.

Collect Dark Moon Jelly

 * This can only be completed in The City of Wizards. Lemon Cookie will be perfect for this, as his Electro Shield can attract Dark Moon jellies. Moonlight Cookie also works with her Moonlight Magic.

Collect Giant Bear Jelly

 * Just play normally. Dragon's Valley and Primeval Jungle has a lot of Giant Bear Jellies, but well into the last stage. Hope you're good at getting that far!
 * Prophet Cookie and Purple Candle sometimes generate these. If you are lucky enough to have Luck-o'-Lantern, use Luck-o'-Lantern as it is the only pet that produces Giant Bear Jellies as part of its ability.
 * If you're lucky, going into Rainbow Rush Bonus Time is ideal.

Collect Giant Gold Coins

 * Use Gold Drop as the Giant Gold Coins produced by Paprika Punching Bag and Mr. Fa-Sol-La-Si do not count.
 * Mint Choco Cookie can generate Giant Gold Coins with Violin Performance.
 * Alchemist Cookie can generate Giant Gold Coins with Alchemy.
 * Run in Ghost Pirate's Island of Coins.

Collect Giant Potions

 * Just play normally. Primeval Jungle has the most Giant Potions at 11. Escape from the Oven has only 10 but it's much easier to earn.

Collect Jellies in Bonus Time

 * Cozy Yarn and Magic Pod will help you get into Bonus Time to collect the jellies you need.
 * Strawberry Cookie will give you additional time in Bonus Time for you to collect jellies.
 * Apple Cookie and Cherry Blossom Cookie create additional special Jellies when in Bonus Time.

Collect Jellies using Pet

 * Marshmallow Hamster will shine on this one. If you are using a fast start, tap it after you see Hamster goes to front so it will get you Jellies!
 * Other pets that collects Jellies such as Cheeseberry will work.
 * Any pet that grants Magnet Jellies such as Electric Beat will do great.
 * If you're lucky, a Magnet Jelly paired with Mini Jackson No. 2, Paper Boat Sailor, Cinnamon Bunny, or Castanets during their ability will give you a lot of Jellies.

Collect Many Jellies

 * Mini Jackson No. 2, Paper Boat Sailor, Cinnamon Bunny, Castanets, Purple Candle, or Jellyco Cube will make a lot of jellies.
 * Using Cookies that can generate jellies on their own will be effective. Cherry Cookie, Cherry Blossom Cookie, Cream Puff Cookie, Cinnamon Cookie, and Pink Choco Cookie to name a few will do you good.
 * Using Treasures such as Jumpy Jelly Bouncy Ride or Lime Scented Eye Makeup Remover will generate a lot of Jellies.

Collect Pink Bear Jelly

 * Pink Choco Cookie will be able to generate a lot of Pink Bear Jellies. It is ideal to pair her up with either Owlcorn or Double Bubble with either the Pink Bear Jelly Party Hat or a Tea Cup's Cherry Blossom Teaspoon treasure.
 * Cream Puff Cookie can use the same Pink Choco Cookie strategy above due to her Magic Apprentice ability.
 * Alchemist Cookie can generate Pink Bear Jellies with Alchemy.
 * Pink Candy can generate Pink Bear Jellies.
 * Electro Lemon will give you a all-bear potion with a blast, which might be useful especially when paired with Cherry Cookie with either the Pink Bear Jelly Party Hat or a Tea Cup's Cherry Blossom Teaspoon treasure.

Collect Silver Coins

 * Mint Choco Cookie and Cheesecake Cookie will do.
 * Alchemist Cookie can generate coins and Coin Power Jellies with Alchemy
 * Hat of Santa will also generate silver coins.
 * If you have a Prosperity Bracelet of Earth treasure, great! It will help you quickly accumulate silver coins.
 * Pirate's Bomb will create a lot of silver coins considering there is a lot of obstacles. This would be best used in Episodes 3 or 4.
 * Using Any treasure that may generate Coin Flowers would help as well.
 * Run in Ghost Pirate's Island of Coins.

Collect Gold Coins

 * Mint Choco Cookie and Cheesecake Cookie should work.
 * Pirate's Bomb combined with Gold Coins Boost will also give a lot of Gold Coins.
 * Use Treasures that generate Winged Gold Coins such as Uncooling Teacup's Golden Jujube Tea Bag and Splendidly Shiny Golden Mace.
 * Run in Ghost Pirate's Island of Coins.

Collect Winged Jellies

 * You can get a lot of Winged Jellies during Bonus Time (Primeval Jungle or later), so using pets that can take you to Bonus Time such as Cozy Yarn and Magic Pod. For Cookies, Cheesecake Cookie or Pink Choco Cookie will work.
 * Adventurer Cookie's dungeon also have lots of Winged Jellies
 * Strawberry Cookie can make you longer in Bonus Time, you can combination with Waterproof Superwatch and Magic Pod's Fragile Petal
 * Stage 7 (Dragon's Treasure Horde) of Dragon's Valley contains flying coins which would also work if you can get a longer run.
 * Using Treasures that generate Winged Coins such as Uncooling Teacup's Golden Jujube Tea Bag or Splendidly Shiny Golden Mace will work great.

Collect Yellow Bear Jellies

 * Cherry Cookie or Cream Puff Cookie with Owlcorn or Double Bubble will work.
 * Prophet Cookie will give you a lot of chances to nab Yellow Bear jellies during his Second Sight ability.
 * Alchemist Cookie can generate Yellow Bear Jellies with Alchemy.
 * Pink Candy can generate Yellow Bear Jellies.
 * Electro Lemon will give you a all-bear potion with a blast, which might be useful especially when paired with Cherry Cookie, Lemon Cookie or Cream Puff Cookie.

List of Challenges and Rewards
The requirements will keep increasing the further you go - it will essentially become an extreme endurance challenge. You may need to use Cookies, pets and treasures you've rarely or never used, and may need to practice a lot. If you fail, tweak your combis or try again!