In the manga, it was first created when all the Mew Mews combined their powers when Zakuro's TV interview was attacked by Quiche (the anime version changed this to them just giving the regular StrawBell Bell enough power to defeat the Chimera Anima). And it was the Ribbon Stawberry Check Healing attack that gets rid of the poison cherry tree problem (the anime changes this to all the Mew Mews using their powers at the same time to fix the problem).