Yuu☆Yuu☆Hakusho, Ueki no Housoku Recommendations
Both refer to the use of Super Powers of great destruction,also, both anime\'s have a great story line and the main characters share a common goal,to become the best.
power given to school kid, they enter a tournament
shounen about superpower, fighting tournaments, holy themes, great action!
Most claim it to be the classic shonen but YYH is similar in a sense where theres a tournament where demons battle it out (though not for a reason like becoming god) thought it is based on heaven and the main character is a unique teenager.
Both contain lots of fighting, lots of growing up, and both are kind of tournament based. Also both have lots of feels <3