i can't defeat the black wolf
how much HP does it have?
250.
Use your Skills until you're out of SP. This one can use its own skill twice to restore 75 HP once it gets below 50%.
You should also grind in the room before that, or even earlier, because they're both still at level 2! This game is much easier if you aren't avoiding battles ALL the time, because this is only the 2nd of over 10 required, and several optional bosses.