u have to fight the tima trail at the begin at the sercert net then u get the 5 star but u have to have 85 mega chip and 200 chip to get it

the seven stars.

the first star (yellow) is obtained by defeating alpha.

the second star (blue) is earned by obtaining all 200 standard chips.

the third star (green) is won by beating bass gs.

the fourth star (light blue) is won after beating all the time trial navis. i recomend that you use the hubbact program, it is the following programs all in one:
undrsht, airshoes, shadowshoes, brakebuster, megafldr1 (one more mega chip in folder), custom1 (one more chip in custom screen), super armor, and shield. use this and the fam folder, acquired in the dnn studio lobby for every one of the navis except protoman, mistman, japanman and darkman. for these navis, use reflect program.
the error code for hubbact changes with your style.

from here on, i am not sure of the color of the stars.

the fifth star is the prize for getting all 85 mega chips (not sure on number, might be 84) you will have to trade with another version (white with blue, vice versa) to get all mega chips. you will also have to get the team style, and beat all of the navis in under 20 seconds with an "S".

the sixth, is awarded for beating all 15, omega navis (p.s. you get the corrisponding giga chips from them) you will have to trade with the opposite version to get all giga chips. (white with blue, vice versa)i do not know the locations of the omega navis

the seventh, and final star is for completing all 32 p.a.'s.

i hope this helps, imyself have only obtained four stars, but i know how to get the other three from other websites.

I knew but i forgot.