E-101 Beta

E-101 Beta was the first model, (not counting E-100 Alpha), of Dr. Eggman's E-100 Series robots and was equipped with upgrades due to its promising performance. Beta was later destroyed by his "brother" E-102 Gamma after he rebelled against Eggman and struck out on his own, destroying any other E-100 unit he could find. (StH: #80, #81, #82 SSS: #13 SU: #3)

In SU: #3, Beta's upgraded design was mistakenly coloured black, yellow and red compared to his upgraded black, white and green design in Sonic Adventure.