An infamous bootleg Game Boy developer who was credited under "Yong Yong" in Sonic 3D Blast 5. The name "Makon Soft Studios" is derived from the maker code "MK" in the header and a string writing to the RAM in these games.
Their games are criticized for their poor quality in both presentation and gameplay, though they're notable for being the only unlicensed developer that utilizes the Game Boy Rumble Cart that only a few licensed titles made use of.
Appears to have connection with the Wenguang Yang team of ex-Sachen developers, which the only known staff Eric Wu had worked on both of them, and the team even ported Sachen's Rocman X to the Game Boy Color with equally disastrous results.
In early 2010s, an entity named "Makon Mobile Studio" released a few mobile games on the Android Market. Investigations on these games shown several connections to Makon Soft Studios, though the extent of which (and whether they can be considered as the same team or not) is unknown.