Well. Supposed you never knew of this strategy of beating Solaris (never came up to mind) and you wanted to beat him. The Question is how? All i did was to use intimidate, baby-doll eyes(due to priority), and hoping to sand attack for accuracy decrease(took about 30-50 attempts to succeeded) then use toxic with my Roserade 3 times (because Solaris used so much full restores) and with only 13 HP, I defeated Solaris(In my second play through). Man i was annoyed when i didn't make it my first time, but this second game i was determined to do everything on my hand and power to defeat Solaris.