An old rumour that says you can kill the bear if your game glitches during Multiplayer only - and this is my first bear kill. ^^ Get revenge if you're sick of being killed by this pesky bear!
Notes: To kill him, join a game with four other players and when the game is loading, find a bear and attack from the side or behind - it cannot claw you from there. Then continue to bite it - eventually its health bar will disappear, leaving the bear standing there doing nothing but looking around. It's dead. But since WolfQuest's bears aren't killable, you're left with a bear you can walk right through without being harmed.
I found Bob near Dead Tree in this video right after joining another game. There's no true strategy to killing him other than staying away from the front area of the bear! :D
Another rumour: flower which plays different music. The flower is found quite easily - start where the Dead Tree area's lake is, then turn left and run around the slope area - the flower is found down there. Just listen for a change in the music once you're standing close to it ;)
You'll see the flower @ 1:28 but it's hard to spot with the effect I used.