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.