Sigma Posting (Follow on BS)さんのイラストまとめ

Gutsplosion Man

Sigolbez and Shadow Drigma

Source: Golbez and Shadow Dragon
Final Fantasy IV (SNES) by Square

The Four Fiends of Sigma
Sigmiglione, Sigmazzo, Barbarigma, and Sigmicante

Source: The Four Fiends of the Elements
Scarmiglione, Cagnazzo, Barbariccia, and Rubicante
Final Fantasy IV (SNES) by Square

Sigraken

Source: Kraken
Earthbound (SNES) by Ape and HAL Laboratory

Sigmalrog

Source: Balrog
Pocket Kingdom: Own the World (N-Gage) by Sega

Sigmai Shigmiranui

Source: Mai Shiranui
The King of Fighters EX: NeoBlood (GBA) by Artoon

Sigmargropilon

Source: Aegargropilon
Secret of Mana (SNES) by Square

Sigmazuna

Source: Yokozuna
Contra: Hard Corps (Genesis) by Konami

Giant Sigmantinel

Source: Giant Sentinel
Captain America and The Avengers (Genesis) by Data East

Sigmario

Source: Mario (Unused)
Astal (Saturn) by Sega