Well, if you've played the other megaman battle network games, then your not missing much.

User Rating: 7.7 | Mega Man Battle Network 5: Team Colonel GBA
This game is one of my top gba games. It's got a descent story with some interesting characters, the simple qualities of a Megaman game. The story starts off with two guys talking about a project that they will leave to their sons and the next generation. When the story starts, you are Lan, a sixth grader in ADCD Town, who has an unusual navi. The story starts with your dad is a top class scientist inviting you to his lab to see something. When you arrive he arrives at his dad's lab, a gas bomb is set off and Lan's dad and friends are taken away from him. Soon after, trouble starts to brew at the lab with a navi attacking the system. When you find a beat this navi, he'll tell you about a team of navis that he's assembling to force back the evil group known as Nebula, who ironically are the ones who kidnapped your dad and friends. This game has a pretty good story line with some interesting bosses. Unlike other MBN games, in this game to get to a boss navi, instead of going through puzzles and traps, you are on a grid-like, turn based playing field. In here, it's all about strategy. Once of of your team goes, then the enemy team goes. You go on with this until one team is defeated. Although there are many thigs that you can do in this game, the battles start to get a little annoying. There will be times where you will run into a battle every other step and then times where you barely ever run into battles. Overall if you've played the other MBN games, you should definetly play this game. As for if your starting, you should try the first or second one if you can find them.