One of four areas can be chosen here. Whichever area is picked determines what your growing monster will evolve into. The ranch can be swapped at any time, so mixing up areas while your monster grows will yield different results in its evolution. More details can be found on the Ranches & Growth page.

A special minigame where your monster shoots down incoming missiles and increases their battle power. You can choose either high, middle, or low as your monster attempts to intercept the missiles as they appear; the direction the missiles fly in is completely random. Each game is a best of 3, so winning twice is all that's needed to result in victory.

Every monster is born with 10 points of strength. Winning a game (shooting missiles correctly 2 out of 3 times) grants 2 points, but completely sweeping a match (all 3 missiles destroyed) grants 4 points. The maximum power of a monster is 225 points. Also, if your monster dies, 1/5th of its strength is passed down to the next egg.

A menu where, by pressing right or left on the D-pad, you can view some details about your monster such as its list number, name, an animation of it walking and attacking, and its stats. Its entry will only appear when it has fully grown. Every monster has a unique DNA combination that is used for calculating what it mutates into after assimilating other monsters through victorious battles. A table showing the many possible combinations can be found on the Ranches & Growth page.

A digital encyclopedia that catalogs all the monsters you have raised and seen. While the listing only appears to go up to 30, there are five secret monster entries, resulting in 35 required in order to complete it. By pressing right or left on the D-pad, you have access to a monster's number, name, an animation of it walking and attacking, its stats, and a screen with three specific details:

• イクセイ (ikusei) - if you have raised/obtained this monster
• ショウリ (shouri) - if you have won a battle with this monster
• ミタ (mita) - if you have seen this monster

A box will appear beside each detail when it has been achieved. Upon completion of the monster list, you are greeted with a congratulatory screen from the developers. If your monster dies due to the VMU being left on too long, all collected data is erased. If your monster dies as a result of battle, however, all List data will remain.

The game's primary feature, this is where you take your monster to fight against other monsters. By linking two VMUs and pressing A on this screen, a battle will occur, with the victorious monster absorbing the DNA of the loser and the defeated monster dying.

In battle, the chances of a monster landing a critical hit (doing double damage), as well as the chances of them dodging an attack, depends on the strength points accumulated from the "Shoot Down" minigame. A very strong monster has only a 10% chance of landing a critical hit, while a much weaker monster has as much as a 30% chance. However, a strong monster has a 30% chance to dodge an attack, while a very weak monster only has around a 5% chance. Lastly, there is the very rare "one hit" attack, where a single strike will down an opponent regardless of strength. Monsters that have recently reached their grown form appear to have the highest probability of performing this during battle.

Regardless of whether you win or lose, your opponent's monster's information will still be registered in the "List" menu.

A simple menu where the sound can be turned on or off.