In the pursuit of a seamless understanding of Pavlovian conditioning across levels of analysis, we wish to address three considerable gaps that exist in current understanding. First, it remains to be seen how eyelid-related Purkinje cells in awake mice behave within a functional, undamaged brain, as existing work has relied heavily on the decerebrate preparation. Especially complex spike activity may depend to a large degree on circuitry level factors, which are likely different between awake and decerebrated preparations. Second, the potential disqualification of MLIs as a main mechanism underlying Purkinje cell simple spike suppression raises the questions of what role they do carry, if and how they modulate in an eyeblink-conditioning paradigm, and to what extent their activity correlates with eyelid behavior. Finally, trial-by-trial quantification of simultaneously recorded conditioned eyelid behavior and cerebellar cortical activity in awake behaving animals is lacking so far. To bridge these gaps, we here present simultaneously recorded cerebellar cortical electrophysiology and eyelid behavior from awake behaving mice that were either naive or trained in an eyeblink-conditioning paradigm. Additionally, we present behavioral data obtained from two independent transgenic mouse mutants in which MLI inhibition was impaired through different mechanisms