Pokemon Emerald but I beat the league with only Rayquaza (UNEDITED) 

I beat Pokemon Emerald using only Rayquaza, got over levelled but at least I beat it. Video says everything. Also, here's the music-
Cartoon, Jeja- On and On
Cartoon, Jeja- Why we lose
Cartoon, Jeja- C U Again
Cartoon, Jeja- Howling
all are NCS Releases
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Bye and go watch the video if you haven't already