Monster Rancher Advance 2

Monster Rancher Advanced 2 is the second game in the GBA version of the series and the superior of the two. You take control of a new trainer and with the help of your assistant raise monsters of all kind of varieties. In the game you get your monsters by entering random letters and symbols that are then used in an RNG function to spawn a monster. You start with just 4 'spaces' and eventually unlock more to make more and stronger / more rare. The story and game progress slowly, but is worth the time for those who love games that require you to grind, plan, and work toward your goals.