Sorry for my previous answer. As it turns out, 1) Entry Hazards ROCK in wifi, BR, and Colluseum.2) Even an idiot would know to have some thing good against fire (I have Golem) to cover the 4x weakness. And 3) Looking past the 4x weakness, they're pretty good. If You want a Physical tank, Ferrothorn is PERFECT, due to Its high Def. and Iron Barbs. It'll also take out pokemon easily with gyro ball(look up its speed) and annoy the opponent with Ingrain. Here's a tip: EXPLOSION'S HORRIBLE ON ANY POKEMON! Now forretress... Make sure the first attack is a good one. It's a Tank because of Def. and Sturdy. That's pretty good, but what if you were facing against Chandelure or Victini or some fire type with a high sp. atk.? For both forretress and ferrothorn: PWN! Forretress is good for toxic spikes, but in wi fi, I'm sure many people know how good. so anyway, it all depends on what you're specifically looking for (just TANK is not enough). Even I'm torn in this decision. Sorry if this answer is bad, too short, or wrong. I'm so bad, In Platinum, 3 of my pokemon were evolved by a friend (thanks for the weavile, Yanmega, and Togekiss). Hide it if you want.