I did a whole lot of pixel icons during my time on Amino, and I still enjoy making them.
From left to right:
Top row: Acori, owned by me. Stormfoot, owned by me. My brother, owned by my brother I suppose?
Middle row: Sollux Captor themed dragon, owned by Mamu on Amino. Tropics, owned by an Amino user. Knuckles the Echidna, owned by Sega.
Bottom row: Soren, owned by an Amino user. Raovent, owned by an Amino user. Morrow, owned by an Amino user.

If you want to crop this to use the Knuckles icon, I'm fine with that as long as you credit me. Do NOT use any of the others.