They also participated in pre-National Day Parade activities, were displayed at competition venues and were featured in Youth Olympics memorabilia.

They often reflect the culture and history of the hosting region, and have traits chosen to embody the ideals of Olympism and the Paralympic movement.

In early 2009, seven shortlisted mascot design proposals were submitted to the Singapore Youth Olympic Games Organising Committee (SYOGOC).

Cubix initially sought to develop robot mascots, intending to showcase Singapore as a "technologically advanced country".

[7] The two mascots were officially introduced by Minister for Community Development, Youth and Sports Dr. Vivian Balakrishnan on 21 November 2009 at Suntec City.

The Olympic theme featured in Singapore's 2010 National Day Parade, also held in the month of August, and Lyo and Merly participated in pre-parade activities.

Four postage stamps depicting the mascots in poses featuring the Games' Culture and Education Programme (CEP) and Olympic sports were also launched by the SYOGOC and Singapore Post.

[12] A mural of the duo made by artist Charlene Tenio was showcased at a party held at the official hotel partner, Fairmont Singapore, to commemorate the 150-day countdown to the Games.