He is respected as one of the most skilled fighters of the Muay Thai golden era who fought a wide variety of opponents.

He won both of his Lumpinee Stadium titles against "The Wonder Boy" Karuhat Sor.Supawan and "Mr. Merciless Knee" Langsuan Panyuthaphum and defended them both against Oley Kiatoneway.

[1] Ramoon and his twin brother were born into a poor family living in Chachoengsao province on November 16, 1970.

After Ramoon fought out of Sitmabon around 50 times, the twins were found by a talent scout from Bangkok and were transferred to the Sor.Ploenchit gym at 13-years-old.

The twins would adopt the ring names Boonlai and Boonlong Sor.Thanikul and made the rest of their careers fighting out of their new gym.

As one of the most skilled rope-a-dope Muay Femur of the golden era, Boonlai excelled in all attacks, particularly in counter-striking, as can be seen in his fights.

Boonlai beat an unusually wide variety fighters of his era such as Langsuan Panyuthaphum, Namkabuan Nongkeepahuyuth, Jongsanan Fairtex, Wangchannoi Sor Palangchai, Jaroensap Kiatbanchong, and Somrak Khamsing.

[11] After his Muay Thai career, Boonlai became a trainer in various camps in Bangkok as well as opening his own gym called Sor.Korpilap in 2010.