I don't really know.... probably Tikal?
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No. Tikal is a member of a tribe of echidnas from thousands of years ago that Knuckles is the last survivor of.
yes rouge is his sister so for all you "knurouge" fans that would be wrong! Kenpachi54 Answer: ACTUALLY NO! I don't know if Knuckle's has a sister but I know for a fact that Rouge has NO brothers or sisters (WHAT SO EVER!!!). Even though Knuckles and Rouge are the same species (Echidan), Knuckles is like half porcupine and Rouge is like Bat (But they are Echidan) P.S.: ROUGE HAS NO BROTHERS OR SISTERS WHATS SO EVER!!!! But I don't know if Knuckles has any I just know its not Rouge (Don't edit this answer. I know what I put and I will edit it back if you edit it)
no you can not get knuckles
yes he can but he turn into hyper knuckles and he is pink.
knuckles of course