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Not at all. In fact, I recommend it.
As a kid, Goku taught me how to be courageous and cheerful in spite of hardships and pain. He taught me to love sports and eat vegetables. He taught me to see the good in others in spite of their actions. Goku is pure of heart, possessing no negative feelings or thoughts. Because of him, I also fear my wife's temper.
Please read the Dao of Dragon Ball Z and watch the upcoming "3rd Adam" video on a missionary named Spencer Smith's YouTube channel. Dragon Ball Z is not biblical nor Christian. But rather it is promoting devilish eastern religions that are not of God. Please do not watch it nor let impressionable kids do so either.
Revelation 12:9, Ephesians 5:11, 1 John 2:15-17, Psalm 103:1.
The true Jesus Christ and the gospel of salvation through Him: John 14:6, 1 Cor. 15:1-4, John 3:16, 3:36, Romans 3:10, 3:23, 6:23, 5:8, 10:9, 10:13, Acts 16:30-31 Ephesians 2:8-9 KJV.
Praying for all who read this.