YOU SAID:

That attack that jojo used was very useless

INTO JAPANESE

ジョジョが使用した攻撃は非常に役に立たなかった

BACK INTO ENGLISH

The attack Jojo used was not very helpful

INTO JAPANESE

Jojoが使用した攻撃はあまり役に立たなかった

BACK INTO ENGLISH

The attack Jojo used was not very helpful