So yesterday I finally decided to go out and do the Plants vs Zombies or as it is called in WoW Peacebloom vs Ghouls. It wasn't overly difficult and was fun. I actually enjoy the regular plants vs zombies so that may have something to do with it. I would say I used a strat but really it just comes down to having enough sun power which is achieved at the later levels with 2 rows of sunflowers. Then just go to town with the spitters and block off any areas that seem to be breaching.
Last wave on the second to last level
Up against the last bossMy new singing pet
So go have your fun and get this pet as your reward. Hope Blizzard does more games within the game in the future as I find things like this extremely fun.