You don't. It has nothing to do with beating the game.
no
Frogs have nothing to do with the island quest.
Frogs have nothing to do with the island quest.
its just for show
You can't scare Gina with the frog! Shocker!
You can't. He just hops away. (Frogs have nothing to do with the quest.)
you dont need to do anything with the frog on big nate it is something to look at or click on it and it hops
You don't need to get the frog to complete Big Nate!
In the detention room, Use the stink bomb to send the teacher out, then click on the desk.
You do not play as Big Nate. He accompanies you around most of the island, and races you on the jet skis.
You can't play "as" Nate, but everywhere you go on the island, he tags along.
There is no Duke among the characters of Big Nate island.