knuckles the echidna

in the games:knuckles is the guardian of angel island and first appears in sonic the hedgehog 3

in the comics:he first appears in #13 and is working for robotnik but sonic makes him good
later he beats mecha sonic as mecha knuckles

then in the chaos knuckles saga knuckles absorbs too much chaos energy and turns green
gets arrested and very agitated and ends up dead

in the return to angel island saga knuckles meets kneecaps and becomes hyper knuckles

in the enerjak reborn saga

knuckles becomes enerjak and wrecks havoc

and fights super sonic

then in echos of the past he teams up with the downunda ff to beat finitevus

see ya