It's less about the mask itself than it is about the skills you put into the mask. If you want a distraction, try using the Fluffy Mask with Speedy Recovery. With the mask, Cha-cha pansies out at half HP and takes only a few seconds to get back in the game with the boost from the ability.
You're not using Cha-Cha so he can hurt the monster/do damage are you? I sure hope not. I just use him as a distraction and so he can buff/heal me with dances --- MWR FC - 047339702983 "CQC :J Funky" MH3 - 8WH324 "Colin" (so no one questions my authenticiteh >:O)
These days I usually make him have the Felyne mask for fun or just fluffy mask for support. Stick gathering on there so you can get extra monster parts. Then use the two dances that give you recovery hi.