Torchlight

This achievement is awesome.

First, you start with a fish as soon as you create a character. Feed it to your pet.
-BOOM achievement.

If that's not to your liking, there are several pools that you can go up to and hit A to fish. when the circle turns red hit A again and you'll catch a fish.

Simply go to your player screen. Select the fish and hit A. It will atomatically feed it to your pet. Transforming it to somethign awesome and netting you an achievement. :)

side note: If a fish says the transformation is "permanent" don't let that fool you. If you don't like what your pet becomes, feed it a different fish and when the time runs out it will change back to its original state.

There is a pool in the first dungeon toward the 'bottom' of the map. You need to watch the outer circle - the moving one - and once it meets the middle hit 'A'. When you've collected your fish, press 'Back', use your left thumb stick to select the fish menu and press 'A' to use. It'll pop as soon as your pet has been transformed.

**The first fish you usually catch is called a 'Webfish' this turns your pet into a spider for about 90 seconds**

This should be the first achievement you earn in the game. as soon as you start the game you have a fish in your inventory. use it and it will turn your pet into an ogre. be warned the ogre fish is permanent.