Knuckles the Echidna/Sunset Black's universe/History and App.

== Past ==
Knuckles lived alone on Angel Island, being one of Sonic's lonely friends. When Sunset arrived on 'his' island, he took a while but sympathized with him.
== history parallel to the current canon ==
=== Sonic Prime ===
Knuckles is one of Sonic's friends who are thrown into the worlds by the Prime Paradox.
==== Alternative form ====
* Knuckles la Terreur
* Bourru
* Knux
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