Simplify the following text for a Grade 9 native English-speaking person.
Original: Over the course of the tournament , he won the GPCW Super-X Monster Championship and IWC World Heavyweight Championship , and on the tournament 's finale , he became the first wrestler to win the AAA World Heavyweight Championship .
Simplified: In the tournament , he won the GPCW Super-X Monster Championship and IWC World Heavyweight Championship . In the final match of the tournament , he became the first wrestler to win the AAA World Heavyweight Championship .