The Most Obscure Sonic Characters Of The Games Canon

You know Sonic, Robotnik, Tails, Knuckles, and a Robot Sonic. Some of you know Shadow, Amy, Silver, Blaze, more than one robot Sonics, and others. Fewer know of a number of scrapped and one-shot characters, and even some unused ones.
But do you know these suckers?:

Heavy The Mechanic

Heavy the Mechanic was a member of the original Chaotix crew.  He was a robot. To most people, he looked like just another Eggman robot. But he's actually good. In Knuckles Chaotix, partners were selected by a crane machine game. Randomly, Heavy (or Bomb) would be selected. Heavy slowed the other character down, but was invincible and could damage enemies. You could play as him by hitting a Heavy monitor or entering a code.

Bomb

Bomb was the other "lost Chaotix." He was selected by grabbing him out of a crane. He was totally useless, as he exploded upon being damaged and was weak even as playable.

Dr. Fukurokov

Dr Fukurokov right here was a boss in Tails Adventures. He just stood there. You beat him by dropping a boulder on the guy. He seemed to be an owl.

Wendy Witchcart

Wendy Witchcart was the final boss of the Japan-Only Tails Skypatrol. She was a witch who turned tresspassers into crystal. Somehow, Tails is a tresspasser and is threatened with crystalization. She rides a minecart.

Fockewulf, Bearanger, and Carrotia

These three were Witchcart's lackeys in the game Tails Skypatrol, and served as bosses. Very little is known about them. 

Sonic Man

Sonic Man was in Sonic The Hedgehog 2006, so his canonicity is unclear. Howevr, he is still just plain odd. You can talk to him and he races you. However, Sonic quickly outruns the poor fellow.

Hatsun

Hatsun is a pigeon who you can talk to in Sonic 06. He just says "coo" and flies off.

King Solomon

King Solomon is a skeleton king featured in Sonic and the Secret Rings. he rules Skeleton Dome and has to be put together by Sonic. He gives Sonic a grim warning.

Generic Animal Avatars

These guys appeared in Sonic's Schoolhouse, and were the playable characters. You played as them instead of Sonic, who was the guide.

And now, for what are probably the two most obscure Sonic characters ever made...

Hip and Hop

The above picture is fan art. These two are so obscure that I can't find a screenshot anywhere. They appeared in Sonic Spinball for the Megadrive, and were in Lava Powerhouse and helped Sonic.