What is the name of the superhero that has the most powers?
name of the superhero refers to superhero_name; superhero that has the most powers refers to MAX(COUNT(superhero_name))
SELECT T1.superhero_name FROM superhero AS T1 INNER JOIN hero_power AS T2 ON T1.id = T2.hero_id GROUP BY T1.superhero_name ORDER BY COUNT(T2.hero_id) DESC LIMIT 1