Locke (Light Mobius)

Locke was a mobian echidna, father of Knuckles, and grandfather of the current guardian Lara-Su. However, locke contracted an illness prior to M:25YL, and died from the illness.

Prior to Mobius: 25 Years Later
At some point, Locke contracted an unknown illness, which left him in critical condition. Unfortunately, Locke did not pull through, and died from the illness, but not before apoligizing to Knuckles for how he raised him, and saying that his son's happiness matters the most to him.

Mobius: 25 Years Later (Unaltered)
Before going with Sonic back in time to prevent Mobius from ceasing to exist, Knuckles visted his father's grave. Thinking about his upbringing, Knuckles realized that, as he was never given the choice of whether or not to be Guardian, he was taking that same choice away from his daughter, Lara-Su. Not wanting to make the same mistake his father did, Knuckles allowed Lara-Su to become Guardian.

"Due to the changes in the timeline, it is unkown if Locke is dead or not. However, as he has yet to make an appearence, it is assumed that he is still dead."