Note: this evolution can be dificult to do as it will take time and it takes a few attempts.
Grow some carrots in your garden to attract Bunnycombes. Get at least two to become residents (feed bunnycombes carrots). The Bunnycombes should attract Pretztails. So when a pretztail comes in your garden, let it eat a bunnycombe and it will become a resident. Do this again so you will have two pretztails. Now go to Lotties' shop ('Costalot shop') and buy a doughnut. Feed it to one of the two Pretztails and it should turn into a Mallowolf if the pretztail doesnt shake his head.
Added by: miksterp Jan 7th 2012, ID#8119