Gashapon is a type of slot machine similar to the real life "catchapon". In-game Gashapon lets a player exchange his or her UC currency for rollouts on one of five different roulettes in the machine. The roulette rolled upon is chosen by the player, each having a variety of robots, weapons, parts and items which are dispensed at random. Not all items are of equal value, and thus rare items have a lower probablity of acquisition. Rarity of an item is indicated by a metal-caste system to denote the value of a particular prize. The cost for one spin on any Gashapon is priced at 2000 UC, or 8000 UC for five spins.
Gold ball: Exceedingly rare. Only premier robot model prizes have this value.
Silver ball: Very rare. Features sub/main weapons and robot models that are of high grade.
Bronze ball: Rare. Typically features weapons that are of significant value.
Green/Red ball: Uncommon. Features weapons that are of above standard grade.
Blue ball: Common. Items used in tune-ups and tune-up parts exchanges are the only prizes featured at this value.
I'm not doing this right now. Betas closing anyways. Three cheers for the Beta!!
Gashapon is found in the shop section of the game. It is indicated by the small, pokeball-esque, icon.