 All of the other characters introduced in the movie were given new  voice actors. The Constructicon Mixmaster (a character voiced by  Frank Welker (qv)) falls into lava in episode 1.11 "Heavy Metal  War". In his next appearance (episode 2.18 "City of Steel"), he acts  quite insane. Later, in season 3, Galvatron (Frank Welker (qv))  lands in lava and goes insane as a result (episodes 3.01, 3.02,  3.03, 3.04 and 3.05 "Five Faces of Darkness Part 1