Okay, let's go over some of the things in this game.

It does offer a good choice of digimon to battle with, which a lot of people may like. I personally enjoyed looking at each digimons special moves / combos (Which can be accomplished by using the following: Down Arrow Key ---> Left/Right Arrow Key.) (also can be done by Tap 3 Times Left/Right Arrow Key <--- This one works for wormmon, can be used for others I'm guessing)

The graphics are okay / good for a GBA game. It has good digimon graphics, the walking and jumping animations are ok, so I think it deserves an 8 for what it provides.

The sound is okay, although while you're battling you may not take the time to listen to it. 

It is very addictive when you're trying to beat certain levels, and the simplicity of it makes it even more addictive as you look into each level.

The depth could be better. Even though it gives digivolving, different levels, a lot of digimon, I personally think it could have provided a little more.

It isn't too hard, except for when you get to Impmon. He aggravated the crap out of me.

Overall, I gave this game an 8.5

ChaoticMonki : I found this game to be fun for the time I was playing it. I also agree that the game could have provided more like extra characters characters to chose from and more battle stages. I liked using Gillmon a lot and getting that item that would appear randomly in order to digivolve.