There are 3 artists that use the name Mega 1. Shapeshifting rhythm oriented unit form Latvia. mostly causing intense breaks and heavy beating, but then again wandering into psychedelic grooves or wherever it takes. highly unregular activity since 2002. 2. Mega, a fleunt welsh pop group of 4 welsh boys. Their names are Marc, Rhydian, Arwel and Trystan. The debut album 'Mwy Na Mawr' was released on the welsh label Recordiau A3 Cyf. based in Cardiff, Wales in 1998.