Roller

Roller, called Arma (アルマ) in the Japanese manual, is an armadillo-like badnik found in Spring Yard Zone in the Sega Mega Drive version of the original Sonic the Hedgehog game. They are enemies which curl in a ball and attempt to run you down. They are invulnerable at this time and can't be attacked until they stop and unfold. If they are left alone they will roll up and move off the screen. If their path of travel is int erupted by a large gap they will jump over it.

Game	Object ID #	Code offset	Mappings offset	Compressed art offset	Subparameters
Sonic the Hedgehog (16-bit)	$43	$DFFA	$E1AC	$3705E (Nemesis Format, 80 blocks)	$00
Sonic 2 (NA)				$AD28C (Nemesis Format)