A great many pokemon (and indeed, people as well) fear ferocious beasts such as Gyarados and Salamence, and find their ability to fight back lessened because of their terror. But it is Togekiss who induce a fear so paralyzing that most pokemon can not even fight back. This paralysis is partially induced by electricity, in the manner which many electric pokemon fight, but even ground pokemon are not totally immune. For when any battle begins, the unimposing Togekiss will rip through the air itself, at best making it difficult to breathe and smashing one's body with a strong wind, at worst creating a mortal fear of asphyxiation in the previously courageous pokemon.
Humans who have battled Togekiss – typically for science, as these pokemon are too rare and valuable in this era to be wasted in war – agree in substance with this analysis, but often found it difficult to put into words, for the memory is nearly as terrifying as the battle. And yet, paleontologists (including the very ones who fought these horrific test battles) remind us, the Togekiss somehow all but went extinct, and millions of years later, most Togetic (a species now far less common than in the Mesozoic) still never bother to evolve.
Togekiss' air slash, however, was not designed to injure opponents with wind or scare them into not fighting back, but to kill them instantly through asphyxiation, as it once did the Kabutops and Omastar. The new megafauna of this age, among them humanity, can hold their breath long enough to survive, making the short-lived vacuums which Togekiss once used to hunt useless. Togekiss possess no other effective means to kill prey, and they eat so slowly that an unconscious pokemon will typically wake up alive before said Togekiss chews through their neck.