As far as i know the only ac game you could trade bugs/fish in was the gamecube version. I know because my friend gave me a banded dragonfly, it was the last bug i needed. to do this you needed to have a gameboy hooked to the gc that gave you access to the island. she went to my island and left the bug in the little hut. only ever did it the once. you could donate it but it didn't count as a bug you caught for catalog completion so u didnt get the reward for that. i did eventually catch one. i prefer to catch them myself though.