Okay...let's look at a couple Scenarios here.
Your on a level 2 Twilight Town.
I've placed a Cerberus and a Behemoth on your world. I have Monstro Level 1 in play. This is not a rare occurance, this scenario would happen 80-95% playing a good Aggro build.
Your Friend Area, Scenario 1: Hayner Pence Ollete, Oathkeeper and Oblivion Equipped to Roxas. 22 ATK total (including friends). Your looking at 32 total Dark Power. I've stalled you for a turn and your out of friends.
Your Friend Area Scenario 2: Fuu, Rai, Seifer, Oathkeeper and Oblivion Equipped to Roxas, full hand of six cards for Seifer. 25 ATK total (including friends.) Your looking at 32 total Dark Power again. I've stalled you a turn and your out of friends.
Your Friend Area Scenario 3: 3 Samurai Nobodies, Oathkeeper and Oblivion Equipped to Roxas. 28 ATK total (including "friends"). Once again looking at 32 Total Dark Power. I've once again stalled you for a turn and your out of friends.
Those are your three best scenarios if I'm not mistaken to maximize your power. Sure, you can just play three more friends next turn (IF you draw all three) cause your running low levels, point is, you've been stalled...and a stalled WR is a dead WR...that's not even taking into consideration that I could drop another Dark to replace the one you managed to kill, cause then your stalled for yet another turn.
Also, sure I understand that an Oblivion (or an Ultima which you should really add) Attack Card could be in your hand at some point, but that's only two turns worth of scraping by and it still forces you to use every last resource you have, and aggro loves it when you use up all your resources, cause it means your vulnerable. My point here is that you should worry about "The Puppy", you should worry about all the dark cards that have been mentioned because you'd have to be really lucky for things to fall just right and work out. That Puppy is probably never going to be dropped on his own unless your running a slow Level 1 World Racer...but that's another problem entirely.