From Nookipedia, the Animal Crossing wiki
Donating to the Museum
In Animal Crossing
"I actually find their voices quite soothing. On an autumn evening, when their cries fill the air... Delightful! Their appearance however, is not in the least bit engaging, and actually borders on repugnant. As for myself, I find them no better than cockroaches. Blech! Vile. Vile indeed. Truly, dirtily vile, eh wot?"
In Wild World
"Autumn bugs like this one often sound alluring, wot? Even so, one look at their plump, repellant bellies is all it takes to......snap me back to reality! Blech! So very vile..."
In City Folk
"Have you ever noticed that these little fellows have a tendency to easily lose or break a leg? Hoo, yes, you catch one in your net, but in doing so you pop off a leg. Then you grow sad and nauseated. And then the broken-off leg keeps kicking despite being no longer attached! And then you flee in terror!"
The grasshopper can then be found on the central terrace of the insect room, by the easternmost stump, along with the Walking Leaf.
In New Leaf
Upon being donated, the grasshopper can be found in the room of the bug exhibit with the Rafflesia in, hopping around in the centre of the room. The exhibit has this to say about the grasshopper:
"Grasshoppers are known for their unique songs, but unlike crickets, it doesn't come from their wings. Rather, the chirping sound comes from their rubbing their legs together. They look like a thicker version of locusts, but some species of grasshoppers actually eat locusts. "
Names in other languages