So, all you are doing is respriting them to look like the bosses, and picked bosses who acted similar or something, I'm asking you WHY you picked those EIGHT robots for Bubble man to fight.
For instance, I'd pick: Sonic, Mega Water S, Wave, Burst, Aqua, Pirate, Splash, and Pump. See the theme there, everyone is a water themed robot, Bubbles could be fighting them because he was the first water themed one.
i like your idea
but i have some problems i have no idea who change with their oh and they are 9 for luck and i need only 8
i picked these bosses because they makes sense
so bubble man hates these tipes of robot he is angry with these bosses
oh i can maked a wire sponge mod but theres no playable sprites
i decidited to change my hornet man into burn rooster here a delicious sprite

used materials : blast hornet head burner man 8-bit fire chill penguin body blast hornet legs overdrive ostrich hands
if anyone is interesed complete the sprite sheet

latest changes
slash man now is cat man
turbo man now is car man
for burst man i not know what select mega water or water man
shade man now is vampire man