Oga is an EXE made by Arthur/ADJ. He was planned to appear in a secret update after 3.0 called Deleted Files. He is based on one of Lord X's old designs.
Oga appears as a slightly fat hedgehog akin to Lord X except for his giant open smile, small dark mixed teeth, and pear-shaped proportions. His fur color is different too as it is a dark purple with off-white for his torso, muzzle, and arms. He also has red pupils, a black X mark on his torso, a stretchable left arm, and black shoes.