Badnik

""Badniks are mass produced robots created by Dr. Eggman to serve as common enemies throughout the game. They ar epowered by little animals which Sonic can free by destroying the badniks. Badniks come in a wide variety of designs and models, suited for the various environments throughout the games.

Classic Games
The classic games are Sonic 1, CD, 2, 3&K, and Mania.

Sonic the Hedgehog 4

 * Fullboar
 * Spikes
 * Steelion - In gameplay, Steelions are only encountered in White Park Zone Act 3. Here they will use the ice cold water to freeze them selves in an ice ball, blocking the player's route. Defeating a Steelion is very difficult as the player needs to time their attack to destroy it.
 * Zoomer
 * Scarbesque
 * Sandworm
 * Flamer
 * Snowy

Dr. Robotnik's Mean Bean Machine

 * Scratch
 * Grounder
 * Coconuts
 * Arms
 * Davy Sprocket
 * Dragon Breath
 * Dynamight
 * Frankly
 * Humpty
 * Sir F-Fuzzy Logik
 * Skeel

Knuckles' Chaotix

 * Balru
 * Carry
 * Dribbler
 * Gotch
 * Happa
 * Juppun
 * Kameka
 * Nishita
 * Pata-Bata
 * Pirani
 * Uniformer
 * Zakku

Sonic R

 * Tails Doll
 * Metal Knuckles

Sonic Advance

 * Drisame
 * GamiGami
 * Hanabii
 * Kero-Kero
 * Kiki
 * Kura
 * Mirror
 * Mogu
 * Oct
 * Mecha Knuckles
 * Pen
 * Pierrot
 * Senbon
 * Slot
 * Tentou
 * Wamu
 * Yukimaru

Sonic Advance 2

 * Balloon
 * Bell
 * Circus
 * Flickey
 * Geji-Geji
 * Ghola
 * Hammerhead
 * Koura
 * Kubinaga
 * Kura-Kura
 * Kyura
 * Madillo
 * Mon
 * Mouse
 * Piko Piko
 * Star
 * Straw
 * Yado

Sonic Advance 3

 * Akatento
 * Ape
 * Bu-bu
 * Clam
 * Condor
 * Gaogao
 * Gekogeko
 * Ginpe
 * Guruguru
 * Hariisen
 * Jousun
 * Juggling
 * Kamaki
 * Kyacchaa
 * Marrun
 * Minimole
 * Muugaden
 * Takkon
 * Uutsubo
 * Yadokka
 * Yukigasen

Sonic Rush Adventure

 * Angler Fish
 * Cave Bat robot
 * Pirahna bot
 * Ptera
 * Steampacker
 * Tokrikeratanku
 * Wrench Swinger

SatAM and Archie

 * Pseudo Sonic

E-Series
"See E-Series"