Soooo just thought I would say this to be completely transparent…
Terios is NOT the result of Mpr*g. DO NOT INTERACT if you think that is what this is.
It. Is. NOT.
Terios is a synthetic hedgehog like that of Shadow.
Sonic and Shadow reached out to Tails to help them bioengineer a child of their own. However, the 17 year old fox was a bit skeptical about dabbling in biological science… however, he would eventually cave and help them as this was something that seemed extremely important to them. With Rouge’s help, the married hedgehogs got ahold of Professor Gerald’s diary to help give them a blueprint for creating another synthetic lifeform.
The project would be dubbed “Project Wish”. The breakthrough in the project came after about 5 years later, when Tails concluded that Shadow’s Black Arms DNA would be the key component to getting the project up off the ground… The couple were against it, as Black Arms DNA could be incredibly dangerous. However, after some debate, they reluctantly went through with it, and in the end they were presented with a fully stable hedgehog specimen.
When reading through Gerald’s diary, Sonic had discovered some entries that went into details about Maria and her involvement in Project Shadow. He had discovered that Gerald had intended to name the Ultimate Lifeform “Terios”, but Maria had enthusiastically suggested “Shadow” instead. Sonic then suggested Terios to Shadow, who wholeheartedly agreed it would be a very fitting name for their son.
[After doing some research, Neji had discovered that the name Terios is defined to be the greek word for “fulfilling wishes” or “dreams coming true”. We agreed that, not only is this name fitting for Terios himself, but it is also a sweet nod to Maria… as she is the very reason Sonic chose to name him this.]