What are the stars next to your save game in mega man battle network 3

These detail your completion of game features, notably: collecting all 200 standard chips, defeating Alpha, defeating BassGS, completing the Time Trials, collecting all 85 mega chips, performing all 32 program advances, and defeating all the omega navis. After the first 5 stars, you can input the code RRLRLRLL to release the omega navis. After the 7th star, you'll be able to fight Alpha omega.