Appearacne:
Android 16 is the penultimate android designed by Dr. Gero to be created exclusively from synthetic technology (although in each alternate timeline he is the last to be created by this method, as Android 19 only exists in the series' mainstream timeline). 16's programming has yet to be completed, and as such Gero opts not to activate him in fear that "[he might destroy androids 17 and 18]." In Goku's Assasins, Dr. Gero even goes as far as to dub Android 16 a prototype. 16's most significant malfunction from Gero's perspective was likely his inherently peaceful behavior, often interacting with nature rather than comply with Gero's orders, making him similar to Android 8.
Abilities:
Android 16 has a weaker version that can be fired from his elbows called Hell's BeamHells flash, a technique where Android 16 lifts his opponent and tosses them to the ground. He then removes halves of each of his arms arm, tucking them beneath his armpits and revealing cannons within the remaining limbs of his arms. These cannons take a brief moment to charge before igniting a giant explosion from which hundreds of small beams are shown sprouting from the crater, possibly to avoid escape. Android 16 uses Hell's Flash against Imperfect Cell, attempting to kill him before he can absorb androids 17 and 18. In Dragon Ball Z burst limit.
