Blue, Green, and Yellow Cubes Explained

There are 3 colored cubes found in game. Blue is for experience, Green is for chain level upgrade, and yellow is for you to sell for cash.

Detailed Explanation:

Blue Cubes
Go to 'Fusion' and fused a blue cube to a pokemon figure to increase experince. Rarer blue cubes gives at around 4500 experience. Fusion requires cash so you better be prepared. The higher the level of the pokemon, the more cash is required

Green Cubes
Go to 'Fusion' and fused a green cube to a pokemon figure to increase 'cLvl' of a pokemon. Once a 'cLvl' is filled up, you gain an additional +1 to all attack moves. Alternatively, you can fuse identical pokemon figures to increase chain level.

Yellow Cubes
Go to 'Shop' and exchange the yellow cubes for cash. This usually gives a large amount of cash ranging from 3500(UC) to 15000(R). You need cash to fuse pokemon figures.

Pokemon Duel Tier List

Not all pokemon figures are created equal. Some are more valuable and others, well, just garbage. Here's a list you need to have in order to have an edge in competitive league rank.

God Tier
Latios, Latias, Lugia, Magmortar, Gardevoir, Genesect, Ho-Oh

Tier 1
Lucario, Rayquaza, Delphox, Greninja, Yveltal, Aggron

Tier 2
Feraligtr, Venusaur, Blastoise, Snorlax, Torterra, Raikou, Typhlosion, Empoleon, Chesnaught, Garchomp, Xerneas, Mewtwo

Tier 3
Dialga, Metagross, Charizard, Giratina, Manaphy, Mew, Groudon

Credits:
https://www.reddit.com/r/pokemonduel/comments/5q6sdw/pokemon_duel_ex_figure_tier_list

Pokemon Duel Quest Rewards

Every time you complete a mission, you earn a chance to spin a red, blue, and purple prizes. Repeating the mission nets you another chance to spin for a prize. Missions can be repeated as long as you have battery.

Ulex

Head Concierge

Reward: Mask

1. Battle and Break Through

Red: Coins x 250

Blue: Tyrogue

2. Use What You've Learned

Red: Coins x 250

Blue: Bidoof

3. Marill Rolls Out!

Red: Coins x 250

Blue: Fletchling

Blue Concierge

Reward: Gems x 10

4. Unbreakable Blue Moves?

Red: Coins x 250

Blue: Marill

5. Step Away, Sentret!

Red: Coins x 250

Blue: Sentret

6. Step Away for Your Safety

Red: Coins x 250

Blue: Sentret

7. White Speed, Blue Armor

Red: Coins x 250

Blue: Fletchling

Purple Concierge

Reward: Mask

8. Flapping Spearow

Red: Coins x 250

Blue: Teddiursa

9. Dangerous Geodude

Red: Coins x 250

Blue: Tyrogue

10. Snubbull Roars!

Red: Coins x 250

Blue: Geodude

11. Back to the Bench with Psychic Power!

Red: Coins x 250

Blue: Snubbull

Yuji

Rewards: Pikachu, Ulex Emblem

The Figures Collector

Red: Coins x 250

Blue: Espurr

Château de Rosa

Security Guard

Reward: Mask

1. Burning Tail Flame

Red: Coins x 250

Blue: Spearow

2. Blue-Shelled Pokemon

Red: Coins x 250

Blue: Tauros

3. Cocky Opponent

Red: Coins x 250

Blue: Tauros

4. Dazzling Thunderbolt!

Red: Coins x 250

Blue: Deino

Toxic Concierge

Reward: Gems x 10

5. Weedle Charges!

Red: Coins x 250

Blue: Weedle

6. Buzzing Beedrill

Red: Coins x 250

Blue: Snubbull

7. Golem and Weedle

Red: Coins x 250

Blue: Cacnea

8. The Sharpest Scythe

Red: Coins x 250

Blue: ???

Purple: Bidoof

9. Watch out for Poison

Red: Coins x 250

Blue: ???

Purple: ???