Robopon 2 Ring and Cross Versions

Robopon 2 Ring Version and Robopon 2 Cross Version are video games published by Atlus and released for the Game Boy Advance in 2001–2002. They are sequels to the Game Boy Color game "Robopon". Their simultaneous release is similar to how the "Pokémon" series of video games are released in pairs of games (such as "Pokémon Red" and "Blue") to promote inter-connectivity between them.
The games are a sequel to the earlier 2000 Game Boy Color game "Robopon Sun". The "Robopon" bears much similarity to Nintendo's series of "Pokémon" games, and thus is often considered to be a "Pokémon" clone, but also bears similarity to the lesser known Super Nintendo Entertainment System game "Robotrek", released by the Japanese game company Enix (now Square Enix).
Story.
After the events of the first game, the now number one Legend of Porombo Island, Cody, sets out for new lands and new titles, but forgets his Robopon. Before he can turn back to retrieve them, his boat is wrecked in a storm, and he washes up on the continent of Majiko. He decides to become the Robopon champion of this land; however, in order to do this, he must obtain the one-of-a-kind XStones and challenge the rank-holders of Majiko. As he collects the XStones, however, he finds the towns of Majiko are troubled by events past and present, and he must travel between the world of 20 years ago and the present to make things right.
Gameplay.
Within both versions of "Robopon 2", Robopon can be created by finding different types of batteries and combining them (this process in known as "sparking"). Each different combination of batteries produces a different type of Robopon. "Robopon 2" also builds upon the battle system of the first game by implementing four-on-four battles, allowing the player's whole party of Robopons to participate in one big battle. Subsequently, targeting certain enemies within battles becomes crucial. Another less drastic change from "Robopon" is the ability to change the colour of the player's Robopon.
Reception.
Both "Robopon 2" games received "average" reviews according to video game review aggregator Metacritic. "GameSpot" named "Robopon 2" the second-best Game Boy Advance game of August 2002.