Armlin, who has Fragile X syndrome, became a fan of Belmonte after watching his YouTube channel.
From there Armlin started imitating Belmonte's famous two-hand bowl and studied his techniques.
Armlin wrote Belmonte a letter telling him how big of a fan he was and about his medals from the Special Olympics- he just won Gold last weekend.
Belmonte wrote back saying that he'd love to bowl a game with Armlin.
And on Thursday night he did that and more, sharing tips, signing autographs and making lifelong memories.