Need Rathalos Ex tip.

[Claire_Pendragon]

this usually only happens if a party member is out of melee range. the best way to avoid this nuisance is to just kick any party members out of the group, who refuse to stay in melee range.
its the hardest move to dodge, and gives the least wiggle room on bad ping. its better not to leave it up to ping chance. (not that ranged will want to stay in melee range, since it easy as heck to avoid attacks from afar.)
if everyone remains in melee range, he will NEVER use this move. its a punishment move, to avoid cheesing with ranged, or OVERLY cautious dodging, where someone runs away extra far, trying to make sure they dodge attacks they arent familiar with.