As part of a range released in 2001 by Tiger Electronics and Hasbro, El Diablo was 1 of 8 robots in the RC Custom Series. Like other robots in the series, El Diablo contained the same chassis as the other toys and built in impact sensors allowed "vitual damage" to be shown on the toy, as a result of ramming and fake scars like the 2nd Edition toys. Flashing LEDs on top of each toy displayed exactly how much damage it had taken, and the robot would cease to function once the light was no longer illuminated. The toy itself is based on El Diablo's Season 2.0 version due to the spiked drum and horns and is a fairly accurate representation of the robot apart from the additional holes for the spiked horns, the much smaller and higher up spiked tail and not being invertible.
El Diablo was the only Middleweight to be released as an R/C toy.