In Kirby Mass Attack, the split Kirbys have 2 hit points each, when a Kirby takes damage, they turn blue to represent having one 1 health now. The Blastoise (and Dark Bowser) are jokes on that gameplay mechanic. When a Kirby 'dies' they turn into a ghost (hence the Dry Bowser reference).
A Bowser: Everyone! Let's take on that punk Dedede for giving a crap about us! Take his crown, take his clothes, take his castle, take over Mushroom Kingdom, take my sweetie princess, take on Mario, and TAKE ON THE WOOOORLD!!! *chases Dedede* Other Bowsers: YEAH YEAH YEAH YEAH YEAH YEAH YEAH YEAH YEAH *chases Dedede as well* Dedede: O_O *runs like hell* AAAAAAAAAHHHH!!! Blastoise: ...seriously, what in the name of earth am I doing here again? I guess I should do something else than this... O_o'
WARNING! Carry on reading! Or you will die, even if you only looked at the word warning! Once there was a little girl called Clarissa, she was ten-years-old and she lived in a mental hospital, because she killed her mom and her dad. She got so bad she went to kill all the staff in the hospital so the More-government decided that best idea was to get rid of her so they set up a special room to kill her, as humane as possible but it went wrong the machine they were using went wrong. And she sat there in agony for hours until she died. Now every week on the day of her death she returns to the person that reads this letter, on a Monday night at 12:00 a.m. She creeps into your room and kills you slowly, by cutting you and watching you bleed to death. Now send this to ten other pictures on this one site, and she will haunt someone else who doesn't. This isn't fake. apparently, if you copy and paste this to ten comments in the next ten minutes you will have the best day of your life tomorrow.You will either get kissed or asked out, if you break this chain u will see a little dead girl in you
In kirby mass attack, the mini kirbies start pink, then if hurt once they turn blue (hence the blastoise), and if hit again or hit with a really bad attack they turn into little white angel ones that the other kirbies need to catch before they float up off the screen ((hence the flying dry bowser))