I saw a weird monster in friend recruit list. and I select it. when battling at last stage(dungeon) I use. it and then when it appeared I cant click the skill button. my ticket went to 0. 
bump
what do you mean by weird? If you didn’t manage to screenshot it, maybe you can describe it, tell us how many stars it had, and I might be able to name it for you.
Was it called Arthrasis? Did the monster take up the whole screen/was really big in the preview?
I’ve come across this before, and it’s clearly the work of a hacker. Arthrasis is an available monster but not in that form. I personally didn’t choose the monster when I came across it, for this reason exactly.