Digimon BattleSpirit 2

Digimon Battle Spirit 2 is a game for Game Boy Advance that was released in 2003, though the original version titled Battle Spirits: Digimon Frontier was released on the Wonderswan Color in 2002.

Story
The plot echoes that of Digimon Frontier; several children receive messages on their cell phones asking them if they want their lives to change. Some answer yes, some answer no. Five who answer yes are summoned to the Digital World where they receive the ability to become Digimon and fight to end Cherubimon's reign of terror.

Gameplay
The game is a versus battlegame, where one of the Human Spirit Digimon fights the other. Unlike most fighting games, the winner is not determined by having the most health, but the most "blue spheres", which are released whenever the player strikes his/her opponent. When you've damaged your opponent enough to fill the gauge at the top, the character's Beast Spirit is activated whenever he/she attacks, allowing them to temporarily digivolve to a higher level, and attack with greater force. Also, yellow diamonds are released during Beast Spirit attacks, and filling the diamond gauge enables the player to momentarily warp digivolve to Ancient Level and fire a powerful attack, before returning to normal (this depletes the diamond gauge to zero). Once all of the Human Spirit Digimon are defeated, the player must then defeat Cherubimon.

There is also a mini-game, where Digimon are used like marbles, and are fired at other Digimon on the board to knock them out of the arena

Characters

 * Agunimon - Uses fire attacks. Beast Spirit is BurningGreymon, and Ancient form is AncientGreymon.
 * Lobomon - Uses laser attacks. Beast Spirit is KendoGarurumon, and Ancient form is AncientGarurumon.
 * Kazemon - Uses wind attacks. Beast Spirit is Zephyrmon, and Ancient form is AncientKazemon.
 * Beetlemon - Uses lightning attacks. Beast Spirit is MetalKabuterimon, and Ancient form is AncientBeetlemon.
 * Kumamon - Uses ice attacks. Beast Spirit is Korikakumon, and Ancient form is AncientMegatheriumon.

Secret Characters

 * ExAgunimon - A bright red version of Agunimon, unlocked when the game is beaten with all six characters, with either Agunimon, Kazemon, or Kumamon getting 800 points. Uses fireball attacks. Beast Spirit is EmperorGreymon, and Ancient form is Susanoomon.
 * ExLobomon - A bright blue version of Lobomon, unlocked when the game is beaten with all six characters, with either Lobomon, Beetlemon, or Loewemon getting 800 points. Uses light saber attacks. Beast Spirit is MagnaGarurumon, and Ancient form is Susanoomon.
 * Loewemon - Unlocked when the game is beaten with Any two Characters. Uses dark energy attacks. Beast Spirit is JagerLoewemon, and Ancient form is AncientSphinxmon