(I am going to use my powers of separation to get 2 points across!!!)
Hmm, something I've been thinking about... What if there was a Metroidvania style game starring Knuckles? I personally think it would be interesting.
I personally think tails would fit that more (he kinda did have one). He just has all of those devises and stuff that it would fit him more
(going towards the metriod half of metroidvanias)
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I have yet to play Sonic and the Secret Rings (probably never will) but i think it looks below par. Here is my biggest complaint why-
WHY THE @#$% WOULD YOU MAKE SONIC MOVE AUTOMATICALLY FORWORD!!!