From Sonic Retro
|Games: Sonic Adventure, Sonic Advance|
The Leon made its debut in Sonic Adventure, where it has the ability to turn invisible to avoid detection and sneak on enemies with its tongue and tail lashing.
Leon only uses its tongue attack in the Dreamcast version of the game. In Sonic Adventure DX: Director's Cut and the 2010 rerelease, Leon never sticks its tongue out and instead continually fades in and out, tending to avoid the player. This altered behavior is due to the Badnik's invisibility timers not being adjusted to compensate for the increased framerate. As a result, it turns invisible too quickly for it to get a chance to attack, and therefore never attacks the player as a result.
The Leon can be found in the following Action Stages:
|Sonic||Windy Valley, Lost World|
|E-102||Windy Valley, Hot Shelter|
The Leon made a second appearance in Sonic Advance, with a completely new design and attack. It crawls around back and forth, and its method of attack is by sticking its large tongue. It shows up in Angel Island Zone.